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 A165615 Primes p such that (p^2-1)/16-p is also a prime number. 2
 31, 79, 97, 127, 191, 239, 241, 337, 401, 577, 751, 769, 881, 1039, 1151, 1231, 1297, 1471, 1487, 1567, 1759, 1777, 1871, 2207, 2591, 2687, 2719, 2767, 2897, 2927, 3041, 3391, 3919, 4159, 4271, 4481, 4591, 4721, 4817, 5231, 5279, 5407, 5711, 6257, 6337 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE For p=31, (31^2-1)/16-31=29 = A165615(1). For p=79, (79^2-1)/16 -79=311 = A165616(2). MATHEMATICA Select[Prime[Range[1000]], PrimeQ[(#^2-1)/16-# ]&] [Harvey P. Dale, Oct 02 2009] CROSSREFS Cf. A165616. Sequence in context: A068917 A317053 A009408 * A142408 A246929 A033220 Adjacent sequences: A165612 A165613 A165614 * A165616 A165617 A165618 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Sep 22 2009 EXTENSIONS Sequence corrected, missing terms added, additional terms added Harvey P. Dale, Oct 02 2009 STATUS approved

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Last modified April 15 04:34 EDT 2024. Contains 371667 sequences. (Running on oeis4.)