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Search: id:A090687
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| A090687 |
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Primes of the form 6n^2+1. |
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+0
2
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| 7, 97, 151, 487, 601, 727, 2647, 3457, 4057, 7351, 9127, 9601, 11617, 12697, 14407, 15607, 17497, 20887, 21601, 29401, 33751, 37447, 39367, 42337, 47527, 53017, 54151, 71287, 77977, 80737, 84967, 95257, 102967, 110977, 126151, 142297, 151687
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Subset of A002476. See also A121326. The n for which 6*n^2 + 1 is prime are 1, 4, 5, 9, 10, 11, 21, 24, 26, 35, 39, 40, 44, 46, 49, 51, 54, 59, 60, 70, 75, 79, 81, 84, 89, 94, 95, 109, 114, 116, 119, 126, 131, 136, 145, 154, ... - Jonathan Vos Post (jvospost2(AT)yahoo.com), Aug 27 2006
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PROGRAM
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(PARI) mx2pmp(n) = { for(x=1, n, y = 6*x^2+1; if(isprime(y), print1(y", ")) ) }
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CROSSREFS
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Cf. A000040, A002476, A090686.
Sequence in context: A036337 A130183 A054932 this_sequence A116125 A142315 A116288
Adjacent sequences: A090684 A090685 A090686 this_sequence A090688 A090689 A090690
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Dec 18 2003
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EXTENSIONS
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Edited by njas at the suggestion of R. J. Mather, Apr 14 2008
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