OFFSET
1,2
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..1000
EXAMPLE
gcd(F(5+1+1), 5-1) = 1 and gcd(F(5+1+2), 5-2) > 1, so that a(5) = 2.
MATHEMATICA
b[n_] := Fibonacci[n]; c[n_] := n;
Table[m = 1; While[GCD[b[n + 1 + m], c[n] - m] == 1, m++]; m, {n, 1, 120}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jul 25 2012
STATUS
approved