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A174011 4*prime(n)-+3 are both prime. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 16 13:51 EDT 2019. Contains 328093 sequences. (Running on oeis4.)