Copy a formula to every other column for more than a thousand columns

[Pandrade]

Hi,
I hope someone can help me write a VBA that will copy a formula to every other column for a large worksheet with more than one thousand columns.

 

[Fluff]

Duplicate How to copy a formula to every other column

Please do not post the same question multiple times. All clarifications, follow-ups, and bumps should be posted back to the original thread.
Per forum rules, posts of a duplicate nature will be locked or deleted (rule 12 here: Forum Rules).