A079348 - OEIS

A079348

Fibonacci{p-(p/5)} is the not the first Fibonacci number that p divides.

13, 17, 29, 37, 41, 47, 53, 61, 73, 89, 97, 101, 107, 109, 113, 137, 139, 149, 151, 157, 173, 181, 193, 197, 199, 211, 229, 233, 241, 257, 263, 269, 277, 281, 293, 307, 313, 317, 331, 337, 347, 349, 353, 373, 389, 397, 401, 409, 421, 433, 449, 457, 461

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OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

EXAMPLE

a(1) = 13 as (13/5) = -1, F(14) = 377 = 13 * 29, however F(7) = 13.

PROG

(PARI) quad5(x)=if (x%5>1 && x%5<4, -1, 1);

forprime (p=7, 500, wss=p-quad5(p); for (n=1, wss, if (fibonacci(n)%p==0, if (n<wss, print1(p", "); break))))

CROSSREFS

Cf. A079346, A079347, A079349.