OFFSET
1,3
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
FORMULA
If n is not divisible by 3 then a(n) = 1, if n = 3 * 2^k * (2m + 1) then a(n) = 2 if k=0 or 2^(k+2) if k>0.
a(n) = F(n) / A174883(n). - Franklin T. Adams-Watters, Jan 24 2012
a(3n) = 2^A090740(n). - Robert Israel, Dec 28 2015
EXAMPLE
a(12) = 16 because the 12th Fibonacci number is 144 and 144 = 9*16.
MAPLE
seq(2^padic:-ordp(combinat:-fibonacci(n), 2), n=1..100); # Robert Israel, Dec 28 2015
PROG
(PARI) a(n)=2^valuation(fibonacci(n), 2) \\Michel Marcus, Jul 30 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Ahmed Fares (ahmedfares(AT)my-deja.com), May 04 2001
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org), May 07 2001
STATUS
approved