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A217494
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Primes of the form 2*n^2 + 34*n + 15.
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14
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631, 883, 1171, 2251, 2683, 8191, 9811, 12511, 20071, 25183, 30871, 33931, 38791, 40483, 57331, 61471, 70183, 81883, 94483, 105211, 125371, 150571, 157231, 167491, 188983, 292483, 315883, 340183, 360271, 423991, 440731, 469351, 481051, 510931
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OFFSET
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1,1
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COMMENTS
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Conjecture: 2^a(n)-1 is not prime; in other words, these primes are included in A054723.
2*a(n)+259 is a square. - Vincenzo Librandi, Mar 04 2013
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..3000
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MATHEMATICA
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Select[Table[2 n^2 + 34 n + 15, {n, 500}], PrimeQ]
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PROG
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(Magma) [a: n in [1..500] | IsPrime(a) where a is 2*n^2+34*n+15];
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CROSSREFS
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Cf. A054723, A176549.
Subsequence of A002145.
Sequence in context: A270802 A119504 A020387 * A105305 A252412 A002227
Adjacent sequences: A217491 A217492 A217493 * A217495 A217496 A217497
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KEYWORD
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nonn,easy
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AUTHOR
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Vincenzo Librandi, Oct 08 2012
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STATUS
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approved
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