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A267481 Primes which are squares (mod 31). 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 19 02:29 EDT 2019. Contains 323377 sequences. (Running on oeis4.)