OFFSET
1,3
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = gcd(n!, Fibonacci(n)).
a(A069180(n)) == 1. - Michel Marcus, Nov 25 2014
EXAMPLE
For n = 8: GCD(8!, Fibonacci(8)) = 21.
MAPLE
seq(igcd(n!, combinat:-fibonacci(n)), n=1..100); # Robert Israel, Nov 24 2014
MATHEMATICA
a[n_] := GCD[n!, Fibonacci[n]];
Table[a[n], {n, 1, 300}]
PROG
(PARI) vector(100, n, gcd(n!, fibonacci(n))) \\ Derek Orr, Nov 24 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Carlos Eduardo Olivieri, Nov 24 2014
STATUS
approved