A140506 Primes congruent to 11 or 19 mod 30.

11, 19, 41, 71, 79, 101, 109, 131, 139, 191, 199, 229, 251, 281, 311, 349, 379, 401, 409, 431, 439, 461, 491, 499, 521, 619, 641, 701, 709, 739, 761, 769, 821, 829, 859, 881, 911, 919, 941, 971, 1009, 1031, 1039, 1061, 1069, 1091, 1129, 1151, 1181, 1249, 1279

Offset

1,1

Links

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

Mathematica

Select[Prime[Range[250]], Mod[#, 30]==19||Mod[#, 30]==11&] (* Harvey P. Dale, Dec. 28, 2010 *)
Select[Prime[Range[210]], MemberQ[{11, 19}, Mod[#, 30]]&] (* Vincenzo Librandi, Aug 15 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(3000)|p mod 30 in {11, 19}]; // Vincenzo Librandi, Dec 18 2010

Crossrefs

Cf. A000040.

Sequence in context: A152313 A034303 A293166 * A259190 A165944 A100557

Adjacent sequences: A140503 A140504 A140505 * A140507 A140508 A140509

Keyword

nonn,easy

Author

Juri-Stepan Gerasimov, Jul 28 2008

Extensions

Corrected by Charles R Greathouse IV, Mar 25 2010

Status

approved