A142217 Primes congruent to 20 mod 41.

61, 307, 389, 881, 1291, 1373, 1619, 1783, 2029, 2111, 2357, 2521, 2767, 3259, 3833, 4079, 4243, 4817, 5227, 5309, 5801, 6047, 6211, 6703, 6949, 7523, 7687, 7933, 8179, 8753, 8999, 9491, 9901, 10639, 11131, 11213, 12197, 12689, 12853, 13099, 13591, 14083

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 02 2016

Mathematica

Select[Range[20, 30000, 41], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 03 2011 *)
Select[Prime[Range[5000]], MemberQ[{20}, Mod[#, 41]]&] (* Vincenzo Librandi, Aug 23 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 41 eq 20 ]; // Vincenzo Librandi, Aug 23 2012
(PARI) is(n)=isprime(n) && n%41==20 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040, A142216.

Sequence in context: A142133 A302730 A234036 * A234029 A142923 A154601

Adjacent sequences: A142214 A142215 A142216 * A142218 A142219 A142220

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved