A142218 Primes congruent to 21 mod 41.

103, 349, 431, 677, 1087, 1579, 1907, 2153, 2399, 3137, 3301, 3547, 3793, 5023, 5351, 5843, 6007, 6089, 6581, 6827, 6991, 7237, 8221, 8467, 8713, 9041, 9533, 9697, 10271, 11173, 12157, 12239, 13469, 13633, 13879, 14207, 14699, 15601, 15683, 16339, 16421

Offset

1,1

Links

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

Formula

a(n) ~ 40n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Range[21, 30000, 41], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 03 2011 *)
Select[Prime[Range[5000]], MemberQ[{21}, Mod[#, 41]]&] (* Vincenzo Librandi, Aug 23 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(17000) | p mod 41 eq 21 ]; (* Vincenzo Librandi, Aug 23 2012 *)
(PARI) is(n)=isprime(n) && n%41==21 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040, A142216, A142217.

Sequence in context: A142531 A142693 A142840 * A330325 A277460 A166056

Adjacent sequences: A142215 A142216 A142217 * A142219 A142220 A142221

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved