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A154648 Primes of the form n^2 - 13. 4
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; text; internal format)
OFFSET

1,1

COMMENTS

Primes of the form 4n^2 - 8n - 9.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..3000

EXAMPLE

For n=3, a(3)=3; n=7, a(7)=131; n=241, a(241)=230387

MATHEMATICA

Select[Range[4, 1000]^2-13, PrimeQ]

PROG

(MAGMA) [a: n in [4..600] | IsPrime(a) where a is n^2-13];

CROSSREFS

Cf. A154650

Sequence in context: A122883 A196424 A091055 * A031970 A196881 A049164

Adjacent sequences:  A154645 A154646 A154647 * A154649 A154650 A154651

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jan 18 2009

EXTENSIONS

Edited by N. J. A. Sloane, Jun 23 2010

STATUS

approved

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Last modified July 4 11:10 EDT 2020. Contains 335447 sequences. (Running on oeis4.)