OFFSET
0,4
MATHEMATICA
Table[IntegerExponent[Round[GoldenRatio^(n^2) QBinomial[2 n, n, -1/GoldenRatio^2]], 2], {n, 0, 30}] (* Vladimir Reshetnikov, Sep 27 2016 *)
PROG
(PARI) a(n)=valuation(prod(m=0, n-1, fibonacci(2*n-m))/prod(m=1, n, fibonacci(m)), 2)
CROSSREFS
KEYWORD
nonn
AUTHOR
Ralf Stephan, Apr 14 2004
EXTENSIONS
a(0) = 0 added and offset changed from 1 to 0 by Vladimir Reshetnikov, Sep 27 2016
STATUS
approved