Hi Kayla
Here are two other codes you may try.
CODE 1
The code will create a 1 to 80 sequence from any selected cell (the active cell) downwards.
If you want to change the sequence, feel free to change/replace the value for the variable (Sq = 80) in the code.
Sub Sequence()
Dim Sq As Variant
Sq = 80
With ActiveCell
.Value = 1
.Offset(1).Resize(Sq - 1, 1).FormulaR1C1 = "=R[-1]C+1"
.Offset(1).Resize(Sq - 1, 1).Value = .Offset(1).Resize(Sq - 1, 1).Value
End With
End Sub

CODE 2
This code is similar, but it will first, ask the user to enter the number the Sequence should end.
Sub AnySequence()
Dim Sq As Variant
Sq = InputBox(Prompt:="Enter a number", Title:="SEQUENCE", Default:=2)
''' ***Error Handlers ****
If Sq = False Then Exit Sub
If Not IsNumeric(Sq) Then Exit Sub
If Sq < 2 Then Exit Sub
If (CLng(Sq) - Sq) <> 0 Then Exit Sub
With ActiveCell
.Value = 1
.Offset(1).Resize(Sq - 1, 1).FormulaR1C1 = "=R[-1]C+1"
.Offset(1).Resize(Sq - 1, 1).Value = .Offset(1).Resize(Sq - 1, 1).Value
End With
End Sub

RESULT

SUGGESTION
If you choose to save the code(s) in your PERSONAL.XLSB VBA project/workbook/file.
Then, you'll be able to run the macros on any Excel file, at your convenience.

I hope this helps you find a solution to your problem.
Regards
Jeovany