Do you mean that the group that I can't use the group found again?

Would you clarify for me what you mean by this?

nice solution bro!

forked here

done

duplicate issues are bad; they make maintenance harder and they discourage users from trying a kata when they accumulate (a kata with tens of open issues is an immediate skip for many people). you can make a fork and i will approve it.

duplicate issue

thank you for the clarification

It was written 9 years ago.

have you tried removing them?

You are right about kung-fu; Hmm: google-fu, google-foo. I think I've seen the latter more often, but I might have screwed up too.

I'm pretty sure I took more than five searches (after countless attempts to get the closed form on the wikipedia page to be short enough).

'foo' as in kung-foo (google-foo arguably rolls off the tongue better than google-jitsu).
Substitute the word 'skill' if you prefer.

You would have to be pretty lucky to come across the exact solution - as linked by Monadius - but it's definitely possible to find various non-recursive fibonacci formulas; it might not be on the first page returned by the most obvious search terms but that's where the google foo, er, skills come in.

Once you've found a formula, you would then need to reduce it's length - hence the golfing skills.

My point was that I'm not some mathematical golfing savant who can just produce the solution from thin air...

You use your google foo to find a non-recursive formula, then your golf-foo to make it short enough.

See my reply above.