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A142440 Primes congruent to 31 mod 49. 1
31, 227, 521, 619, 1109, 1697, 2089, 2383, 2579, 2677, 2971, 3167, 3461, 3559, 3853, 4049, 4441, 4637, 4931, 5323, 5519, 5813, 6793, 7283, 7577, 8263, 8753, 9341, 9439, 9733, 9929, 10223, 10321, 10909, 11399, 11497, 11987, 12281, 12379, 12967, 13163 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

FORMULA

a(n) ~ 42n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[2500]], MemberQ[{31}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 28 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(17000) | p mod 49 eq 31]; // Vincenzo Librandi, Aug 28 2012

(PARI) is(n)=isprime(n) && n%49==31 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A229018 A036335 A075931 * A075932 A161747 A059899

Adjacent sequences:  A142437 A142438 A142439 * A142441 A142442 A142443

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified September 27 12:30 EDT 2020. Contains 337380 sequences. (Running on oeis4.)