$ \left\{\begin{array}{lll} F(0) &=& 1\
F(1) &=& 1\
F(n+1)&=& F(n)+F(n-1), \ \ \ n=2,3,... \right.. $

B1 = 1
A2: B1
A1 = 1
C1: A1 + B1
B2: C1
C2: A2 + B2
A3: B2
B3: C2
C3: A3 + B3
A4: B3
B4: C3
C4: A4 + B4
A5: B4
B5: C4
C5: A5 + B5
A6: B5
B6: C5
C6: A6 + B6
A7: B6
B7: C6
C7: A7 + B7
A8: B7
B8: C7
C8: A8 + B8
A9: B8
B9: C8
C9: A9 + B9
A10: B9
B10: C9
C10: A10 + B10
A11: B10
B11: C10
C11: A11 + B11
A12: B11
B12: C11
C12: A12 + B12
A13: B12
B13: C12
C13: A13 + B13
A14: B13
B14: C13
C14: A14 + B14
A15: B14
B15: C14
C15: A15 + B15
A16: B15
B16: C15
C16: A16 + B16
A17: B16
B17: C16
C17: A17 + B17
A18: B17
B18: C17
C18: A18 + B18
A19: B18
B19: C18
C19: A19 + B19
A20: B19
B20: C19
C20: A20 + B20
A21: B20
B21: C20
C21: A21 + B21
A22: B21
B22: C21
C22: A22 + B22
A23: B22
B23: C22
C23: A23 + B23
A24: B23
B24: C23
C24: A24 + B24
A25: B24
B25: C24
C25: A25 + B25
A26: B25
B26: C25
C26: A26 + B26
A27: B26
B27: C26
C27: A27 + B27
A28: B27
B28: C27
C28: A28 + B28
A29: B28
B29: C28
C29: A29 + B29
A30: B29
B30: C29
C30: A30 + B30
A31: B30
B31: C30
C31: A31 + B31
A32: B31
B32: C31
C32: A32 + B32
A33: B32
B33: C32
C33: A33 + B33
A34: B33
B34: C33
C34: A34 + B34
A35: B34
B35: C34
C35: A35 + B35
A36: B35
B36: C35
C36: A36 + B36
A37: B36
B37: C36
C37: A37 + B37
A38: B37
B38: C37
C38: A38 + B38
A39: B38
B39: C38
C39: A39 + B39
A40: B39
B40: C39
C40: A40 + B40
A41: B40
B41: C40
C41: A41 + B41
A42: B41
B42: C41
C42: A42 + B42
A43: B42
B43: C42
C43: A43 + B43
A44: B43
B44: C43
C44: A44 + B44
A45: B44
B45: C44
C45: A45 + B45
A46: B45
B46: C45
C46: A46 + B46
A47: B46
B47: C46
C47: A47 + B47
A48: B47
B48: C47
C48: A48 + B48
A49: B48
B49: C48
C49: A49 + B49
A50: B49
B50: C49
C50: A50 + B50
A51: B50
B51: C50
C51: A51 + B51
A52: B51
B52: C51
C52: A52 + B52
A53: B52
B53: C52
C53: A53 + B53
A54: B53
B54: C53
C54: A54 + B54
A55: B54
B55: C54
C55: A55 + B55
A56: B55
B56: C55
C56: A56 + B56
A57: B56
B57: C56
C57: A57 + B57
A58: B57
B58: C57
C58: A58 + B58
A59: B58
B59: C58
C59: A59 + B59
A60: B59
B60: C59
C60: A60 + B60
A61: B60
B61: C60
C61: A61 + B61
A62: B61
B62: C61
C62: A62 + B62
A63: B62
B63: C62
C63: A63 + B63
A64: B63
B64: C63
C64: A64 + B64
A65: B64
B65: C64
C65: A65 + B65
A66: B65
B66: C65
C66: A66 + B66
A67: B66
B67: C66
C67: A67 + B67
A68: B67
B68: C67
C68: A68 + B68
A69: B68
B69: C68
C69: A69 + B69
A70: B69
B70: C69
C70: A70 + B70
A71: B70
B71: C70
C71: A71 + B71
A72: B71
B72: C71
C72: A72 + B72
A73: B72
B73: C72
C73: A73 + B73
A74: B73
B74: C73
C74: A74 + B74
A75: B74
B75: C74
C75: A75 + B75
A76: B75
B76: C75
C76: A76 + B76
A77: B76
B77: C76
C77: A77 + B77
A78: B77
B78: C77
C78: A78 + B78
A79: B78
B79: C78
C79: A79 + B79
A80: B79
B80: C79
C80: A80 + B80
A81: B80
B81: C80
C81: A81 + B81
A82: B81
B82: C81
C82: A82 + B82
A83: B82
B83: C82
C83: A83 + B83
A84: B83
B84: C83
C84: A84 + B84
A85: B84
B85: C84
C85: A85 + B85
A86: B85
B86: C85
C86: A86 + B86
A87: B86
B87: C86
C87: A87 + B87
A88: B87
B88: C87
C88: A88 + B88
A89: B88
B89: C88
C89: A89 + B89
A90: B89
B90: C89
C90: A90 + B90
A91: B90
B91: C90
C91: A91 + B91
A92: B91
B92: C91
C92: A92 + B92
A93: B92
B93: C92
C93: A93 + B93
A94: B93
B94: C93
C94: A94 + B94
A95: B94
B95: C94
C95: A95 + B95
A96: B95
B96: C95
C96: A96 + B96
A97: B96
B97: C96
C97: A97 + B97
A98: B97
B98: C97
C98: A98 + B98
A99: B98
B99: C98
C99: A99 + B99
A100: B99
B100: C99
C100: A100 + B100
A101: B100
B101: C100
C101: A101 + B101
A102: B101
B102: C101
C102: A102 + B102
A103: B102
B103: C102
C103: A103 + B103
A104: B103
B104: C103
C104: A104 + B104
A105: B104
B105: C104
C105: A105 + B105
A106: B105
B106: C105
C106: A106 + B106
A107: B106
B107: C106
C107: A107 + B107
A108: B107
B108: C107
C108: A108 + B108
A109: B108
B109: C108
C109: A109 + B109
A110: B109
B110: C109
C110: A110 + B110
A111: B110
B111: C110
C111: A111 + B111
A112: B111
B112: C111
C112: A112 + B112
A113: B112
B113: C112
C113: A113 + B113
A114: B113
B114: C113
C114: A114 + B114
A115: B114
B115: C114
C115: A115 + B115
A116: B115
B116: C115
C116: A116 + B116
A117: B116
B117: C116
C117: A117 + B117
A118: B117
B118: C117
C118: A118 + B118
A119: B118
B119: C118
C119: A119 + B119
A120: B119
B120: C119
C120: A120 + B120
A121: B120
B121: C120
C121: A121 + B121
A122: B121
B122: C121
C122: A122 + B122
A123: B122
B123: C122
C123: A123 + B123
A124: B123
B124: C123
C124: A124 + B124
A125: B124
B125: C124
C125: A125 + B125
A126: B125
B126: C125
C126: A126 + B126
A127: B126
B127: C126
C127: A127 + B127
A128: B127
B128: C127
C128: A128 + B128
A129: B128
B129: C128
C129: A129 + B129
A130: B129
B130: C129
C130: A130 + B130
A131: B130
B131: C130
C131: A131 + B131
A132: B131
B132: C131
C132: A132 + B132
A133: B132
B133: C132
C133: A133 + B133
A134: B133
B134: C133
C134: A134 + B134
A135: B134
B135: C134
C135: A135 + B135
A136: B135
B136: C135
C136: A136 + B136
A137: B136
B137: C136
C137: A137 + B137
A138: B137
B138: C137
C138: A138 + B138
A139: B138
B139: C138
C139: A139 + B139
A140: B139
B140: C139
C140: A140 + B140
A141: B140
B141: C140
C141: A141 + B141
A142: B141
B142: C141
C142: A142 + B142
A143: B142
B143: C142
C143: A143 + B143
A144: B143
B144: C143
C144: A144 + B144
A145: B144
B145: C144
C145: A145 + B145
A146: B145
B146: C145
C146: A146 + B146
A147: B146
B147: C146
C147: A147 + B147
A148: B147
B148: C147
C148: A148 + B148
A149: B148
B149: C148
C149: A149 + B149
lista1: {A1, B1, C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31, C32, C33, C34, C35, C36, C37, C38, C39, C40, C41, C42, C43, C44, C45, C46, C47, C48, C49, C50}
n = 18 (slider from 1 to 50, step 1)
a = Element(lista1, n)
texto1: "Número \ de\  Fibonnaci \ F(" + (LaTeX[n]) + ")=" + (LaTeX[a]) + ""
b = Element(lista1, n - 1)
m: n - 1
c: a / b
texto2: "$ \displaystyle\frac{F(n)}{F(n-1)}= 
\displaystyle\frac{F(" + (LaTeX[n]) + ")}{F(" + (LaTeX[m]) + ")}=
\displaystyle\frac{" + (LaTeX[a]) + " }{ " + (LaTeX[b]) + "} =" + (LaTeX[c]) + "$"