A038672 Primes p such that the p-th Fibonacci number is composite.

19, 31, 37, 41, 53, 59, 61, 67, 71, 73, 79, 89, 97, 101, 103, 107, 109, 113, 127, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337

Offset

1,1

Links

Hans Havermann, Table of n, a(n) for n = 1..10000

Hans Havermann, Composite Prime-Index Fibonacci Numbers Factored

Mathematica

Rest[Select[Prime[Range[68]], ! PrimeQ[Fibonacci[#]] &]] (* Jayanta Basu, Jul 10 2013 *)
s={A083668}; Complement[Prime[Range[2, 10034]], s] (* Hans Havermann, Feb 12 2014 *)

Crossrefs

Cf. A090819 (essentially identical), A083668, A135952.

Sequence in context: A309962 A316678 A330275 * A250216 A125148 A214798

Adjacent sequences: A038669 A038670 A038671 * A038673 A038674 A038675

Keyword

nonn

Author

Jeff Burch

Status

approved