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A002731 Numbers n such that (n^2 + 1)/2 is prime.
(Formerly M2444 N0971)
+0
6
3, 5, 9, 11, 15, 19, 25, 29, 35, 39, 45, 49, 51, 59, 61, 65, 69, 71, 79, 85, 95, 101, 121, 131, 139, 141, 145, 159, 165, 169, 171, 175, 181, 195, 199, 201, 205, 209, 219, 221, 231, 245, 261, 271, 275, 279, 289, 299, 309, 315, 321, 325, 329, 335 (list; graph; listen)
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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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