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A142517 Primes congruent to 21 mod 52. 1
73, 229, 281, 541, 593, 853, 1009, 1061, 1217, 1321, 1373, 1789, 1997, 2153, 2309, 2621, 2777, 3037, 3089, 3557, 4129, 4337, 4441, 4493, 4597, 4649, 4909, 5273, 5689, 5741, 5897, 6053, 6469, 6521, 6781, 6833, 7457, 7561, 7717, 7873, 8081, 8237, 8861, 9173 (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) ~ 24n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[1300]], Mod[#, 52]==21&] (* or *) Select[52*Range[200]+ 21, PrimeQ] (* Harvey P. Dale, Jan 23 2012 *)

Select[Prime[Range[1300]], MemberQ[{21}, Mod[#, 52]] &] (* Vincenzo Librandi, Aug 29 2012 *)

PROG

(Magma) [p: p in PrimesUpTo(10000) | p mod 52 eq 21]; // Vincenzo Librandi, Aug 29 2012

(PARI) is(n)=isprime(n) && n%52==21 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A142894 A141909 A296187 * A158711 A140039 A201715

Adjacent sequences:  A142514 A142515 A142516 * A142518 A142519 A142520

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified October 6 20:00 EDT 2022. Contains 357270 sequences. (Running on oeis4.)