A031378 a(n) = prime(4*n - 2).

3, 13, 29, 43, 61, 79, 101, 113, 139, 163, 181, 199, 229, 251, 271, 293, 317, 349, 373, 397, 421, 443, 463, 491, 521, 557, 577, 601, 619, 647, 673, 701, 733, 757, 787, 821, 839, 863, 887, 929, 953, 983, 1013, 1033, 1061, 1091, 1109, 1151, 1181

Offset: 1

Author

Jeff Burch

Keywords

• nonn

Comments

A subsequence (more precisely, every other term) of A031215, subsequence of A007821 which is the complement of A006450 in the primes A000040. - M. F. Hasler, Oct 19 2013

Links

• Ivan Panchenko, Table of n, a(n) for n = 1..1000

Programs

Magma

[ NthPrime(4*n-2): n in [1..1000] ]; // Vincenzo Librandi, Apr 11 2011

Mathematica

Prime[4*Range[50]-2] (* Harvey P. Dale, Jun 03 2014 *)

PARI

A031378=n->prime(n*4-2) \\ M. F. Hasler, Oct 19 2013

Formula

A031378(n) = A031215(2n-1) = A000040(2(2n-1)). - M. F. Hasler, Oct 19 2013