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 A162857 Primes of form 4p-1, p a prime. 2
 7, 11, 19, 43, 67, 163, 211, 283, 331, 523, 547, 691, 787, 907, 1051, 1123, 1171, 1531, 1723, 1867, 2011, 2083, 2251, 2347, 2371, 2467, 2707, 2731, 2803, 2971, 3187, 3307, 3547, 3643, 3907, 3931, 4051, 4243, 4363, 4603, 4651, 4723, 5107, 5227, 5443, 5923 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS If 4p-1 is prime then n^2+n+p = p(4p-1) for some n = 1,2,3,...[Pf. Let n+1 = 2p, etc.]. LINKS CROSSREFS Sequence in context: A055939 A154555 A285016 * A307965 A323109 A023267 Adjacent sequences:  A162854 A162855 A162856 * A162858 A162859 A162860 KEYWORD nonn AUTHOR Daniel Tisdale, Jul 14 2009 EXTENSIONS More terms from N. J. A. Sloane, Jul 19 2009 STATUS approved

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Last modified February 22 17:14 EST 2020. Contains 332140 sequences. (Running on oeis4.)