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A155737
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Primes of the form 4*n^2 + 2*n -1.
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3
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5, 19, 41, 71, 109, 271, 419, 599, 701, 811, 929, 1481, 1979, 2161, 2351, 2549, 2969, 3191, 3659, 4159, 4421, 4691, 4969, 5851, 7481, 8929, 9311, 10099, 13109, 14519, 16001, 17029, 18089, 19181, 19739, 20879, 22051, 23869, 25121, 25759, 27059
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OFFSET
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1,1
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COMMENTS
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Primes in A125202. - Klaus Purath, Dec 09 2020
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
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MATHEMATICA
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Select[Table[4n^2+2n-1, {n, 0, 200}], PrimeQ] (* Vincenzo Librandi, Jul 23 2012 *)
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PROG
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(Magma) [a: n in [0..100] | IsPrime(a) where a is 4*n^2+2*n-1]; // Vincenzo Librandi, Jul 23 2012
(PARI) (for (n=0, 100, if (isprime (k=4*n^2+2*n-1), print1 (k, ", ")))); // Vincenzo Librandi, Jul 23 2012
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CROSSREFS
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Cf. A155736, A155738, A125202.
Sequence in context: A031379 A125202 A024841 * A100572 A119534 A306190
Adjacent sequences: A155734 A155735 A155736 * A155738 A155739 A155740
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KEYWORD
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nonn,easy
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AUTHOR
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Vincenzo Librandi, Jan 26 2009
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EXTENSIONS
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Incorrect formula deleted by N. J. A. Sloane, Jun 16 2010
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STATUS
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approved
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