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 A155702 Primes of the form 2n^2-9. 3
 23, 41, 89, 191, 233, 383, 503, 569, 1049, 1559, 1913, 2039, 2441, 2729, 2879, 3191, 3863, 4409, 4793, 5399, 6263, 6719, 7433, 8969, 9239, 9791, 12473, 12791, 14783, 16553, 18041, 19991, 20393, 23753, 26903, 29759, 33791, 34313, 37529, 39191, 46199 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Equivalently, primes of the form 2n^2+16n+23. LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..5000 MATHEMATICA Select[Table[2n^2-9, {n, 2, 800}], PrimeQ] PROG (MAGMA) [a: n in [2..300] | IsPrime(a) where a is 2*n^2-9]; CROSSREFS Cf. A155703, A153037. Sequence in context: A083444 A153037 A106970 * A114379 A106969 A304390 Adjacent sequences:  A155699 A155700 A155701 * A155703 A155704 A155705 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Jan 25 2009 EXTENSIONS Definition rewritten by Bruno Berselli, Dec 04 2011 STATUS approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)