Since the (-phi)^(-n) term goes to zero quickly, it's enough to round (phi^n)/sqrt(5)to the nearest integer.

49 characters: die map{int(((1+($^=5**.5))/2)**$_/$^+.5).$/}0..9

In reply to Re^3: Golfing a fibonacci number generator by jdalbec
in thread Golfing a fibonacci number generator by Anonymous Monk

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