OFFSET
1,1
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..1000
EXAMPLE
gcd(F(4+1), 4-1) = 1, gcd(F(4+2), 4-2) > 1, so that a(4) = 2.
MATHEMATICA
b[n_] := Fibonacci[n]; c[n_] := n;
Table[m = 1; While[GCD[b[n + m], c[n] - m] == 1, m++]; m, {n, 1, 120}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jul 25 2012
STATUS
approved