I starting going down that path too, but noticed that it fails for 1. 
$ perl -e'@b=(0,1);@b=($b[1],$b[0]+$b[1])for(2..pop);print$b[1]' 1
1

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Of all the causes that conspire to blind
Man's erring judgment, and misguide the mind,
What the weak head with strongest bias rules,
Is pride, the never-failing vice of fools.
-- Pope.

In reply to Re^2: fibo's 66 chars by pepik_knize
in thread fibo's 66 chars by Oromis92

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