A267481 Primes which are squares (mod 31).

2, 5, 7, 19, 31, 41, 47, 59, 67, 71, 97, 101, 103, 107, 109, 113, 131, 149, 157, 163, 173, 191, 193, 211, 227, 233, 257, 281, 283, 293, 307, 311, 317, 349, 359, 373, 379, 397, 419, 421, 431, 439, 443, 467, 479, 503, 521, 541, 547, 563, 577, 593, 599, 607, 617, 653, 659, 661, 683

Offset

1,1

Links

Table of n, a(n) for n=1..59.

Prog

(PARI) select(p->issquare(Mod(p, 31))&&isprime(p), [1..1000]) \\ This is to provide a generic characteristic function as 1st arg of select(), there are other ways to produce the sequence more efficiently. - M. F. Hasler, Jan 15 2016

Crossrefs

Cf. A191040.

Sequence in context: A108413 A042449 A046115 * A089443 A191024 A215212

Adjacent sequences: A267478 A267479 A267480 * A267482 A267483 A267484

Keyword

nonn

Author

M. F. Hasler, Jan 15 2016

Status

approved