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A154648
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Primes of the form n^2 - 13.
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4
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3, 23, 131, 311, 563, 887, 1283, 2903, 5171, 7043, 8087, 9203, 10391, 12983, 14387, 19031, 28211, 34583, 39191, 41603, 44087, 46643, 51971, 57587, 76163, 86423, 101111, 108887, 125303, 129587, 138371, 142871, 161591, 171383, 191831, 197123
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Primes of the form 4n^2 - 8n - 9.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 1..3000
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EXAMPLE
| For n=3, a(3)=3; n=7, a(7)=131; n=241, a(241)=230387
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MATHEMATICA
| Select[Range[4, 1000]^2-13, PrimeQ]
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PROG
| [a: n in [4..600] | IsPrime(a) where a is n^2-13];
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CROSSREFS
| Cf. A154650
Sequence in context: A122883 A196424 A091055 * A031970 A196881 A049164
Adjacent sequences: A154645 A154646 A154647 * A154649 A154650 A154651
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KEYWORD
| nonn,easy
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AUTHOR
| Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 18 2009
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EXTENSIONS
| Edited by N. J. A. Sloane, Jun 23 2010
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