Calc - Jump to Column by Index (integer not letters)

How does one jump to the nth column in LibreOffice Calc (spreadsheet) without having to try and convert the number ‘n’ to the corresponding alphabetical characters? E.g. in my case I would like to jump to the 79th column. If jumping to the column is not possible, is there a way to change the headers so that they display 1,2,3… or 0,1,2… instead of A,B,C…?

Choose Tools - Options - LibreOffice Calc - Formula
Choose Tools - Options - LibreOffice Calc - Formula