A270387 Primes p such that A000129(p) is not a prime number.

7, 17, 19, 23, 31, 37, 43, 47, 61, 67, 71, 73, 79, 83, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 173, 179, 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, 347, 349, 353, 359, 367

Offset

1,1

Comments

Primes p such that ((1+sqrt(2))^p - (1-sqrt(2))^p) / (2*sqrt(2)) is a composite number.

Links

Table of n, a(n) for n=1..58.

Prog

(PARI) a000129(n) = ([2, 1; 1, 0]^n)[2, 1];
forprime(p=2, 1e3, if(!isprime(a000129(p)), print1(p, ", ")));

Crossrefs

Cf. A000129, A096650.

Sequence in context: A191070 A167797 A001913 * A071845 A084704 A198032

Adjacent sequences: A270384 A270385 A270386 * A270388 A270389 A270390

Keyword

nonn

Author

Altug Alkan, Mar 16 2016

Status

approved