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 A007639 Primes of form 2n^2 - 2n + 19. (Formerly M5070) 3
 19, 23, 31, 43, 59, 79, 103, 131, 163, 199, 239, 283, 331, 383, 439, 499, 563, 631, 859, 1031, 1123, 1319, 1423, 1531, 1759, 1879, 2003, 2131, 2399, 2539, 2683, 3299, 3463, 3631, 3803, 4159, 4723, 4919, 5119, 5323, 5531, 5743, 6863, 7583, 8599 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 H. Dubner, Generalized Cullen numbers, J. Rec. Math., 21 (No. 3, 1989), 190-191. (Annotated scanned copy) FORMULA The primes are congruent to {2, 15, 19, 23, 31, 35, 39, 43, 51, 55, 59, 79, 87, 91, 103, 119, 131, 135, 143} (mod 148). - T. D. Noe, May 02 2008 MATHEMATICA Select[Table[2n^2-2n+19, {n, 90}], PrimeQ] (* Harvey P. Dale, Dec 19 2011 *) PROG (MAGMA) [a: n in [1..60] | IsPrime(a) where a is 2*n^2-2*n+19]; // Vincenzo Librandi, Mar 20 2013 CROSSREFS Cf. A139827. Sequence in context: A322960 A019360 A269666 * A261311 A168144 A108271 Adjacent sequences:  A007636 A007637 A007638 * A007640 A007641 A007642 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified May 6 16:14 EDT 2021. Contains 343586 sequences. (Running on oeis4.)