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 A137460 Prime numbers n such that n^2 +- (n+1) are primes. 1
 3, 5, 17, 71, 101, 131, 677, 839, 857, 1091, 1217, 2129, 2309, 2339, 2957, 3137, 3449, 3989, 4409, 6569, 6719, 6761, 7229, 8501, 8627, 8807, 9521, 9689, 9749, 10589, 10631, 11621, 11777, 11927, 12641, 13487, 13931, 14519, 15527, 15797, 16007 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 FORMULA A053182 INTERSECT A091567. [From R. J. Mathar, Apr 19 2009] EXAMPLE 3^2 +- 4 -> ( 5,13) Primes, 5^2 +- 6 -> (19,31) Primes. MATHEMATICA Select[Prime[Range[800]], PrimeQ[ #^2 - (# + 1)] && PrimeQ[ #^2 + (# + 1)] &] CROSSREFS Sequence in context: A251737 A125957 A259908 * A319908 A232238 A102295 Adjacent sequences:  A137457 A137458 A137459 * A137461 A137462 A137463 KEYWORD nonn,easy AUTHOR Vladimir Joseph Stephan Orlovsky, Apr 21 2008 EXTENSIONS More terms from Karl Hovekamp, Jan 24 2009 STATUS approved

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Last modified October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)