A174011 4*prime(n)-+3 are both prime.

1, 3, 5, 8, 17, 24, 29, 35, 36, 67, 72, 77, 79, 85, 95, 98, 105, 109, 145, 160, 171, 175, 189, 204, 207, 215, 221, 230, 263, 271, 286, 321, 326, 327, 335, 364, 410, 444, 458, 487, 495, 501, 511, 541, 551, 580, 585, 633, 638, 651, 654, 681, 691, 708, 729, 735

Offset

1,2

Links

Harvey P. Dale, Table of n, a(n) for n = 1..3000

Example

a(1)=1 because 4*prime(1)-3=5=prime and 4*prime(1)+3=11=prime; a(2)=3 because 4*prime(3)-3=17=prime and 4*prime(3)+3=23=prime.

Mathematica

Select[Range[800], And@@PrimeQ[4 Prime[#]+{3, -3}]&] (* Harvey P. Dale, Dec 09 2012 *)

Crossrefs

Cf. A000040, A002145, A111055.

Sequence in context: A141775 A056765 A080006 * A291223 A240532 A184434

Adjacent sequences: A174008 A174009 A174010 * A174012 A174013 A174014

Keyword

nonn

Author

Juri-Stepan Gerasimov, Mar 05 2010

Extensions

Corrected (24 inserted, 104 replaced by 105, 114 removed etc.) by R. J. Mathar, Apr 28 2010

Status

approved