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 A113501 Indices of prime NSW numbers A088165. 15
 1, 2, 3, 9, 14, 23, 29, 81, 128, 210, 468, 473, 746, 950, 3344, 4043, 4839, 14376, 39521, 64563, 72984, 82899, 84338, 85206, 86121, 139160 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Very closely related to indices of prime Pell-Lucas numbers (A099088). a(27) > 221400. - Robert Price, Mar 29 2019 LINKS H. Li, T. MacHenry, Permanents and Determinants, Weighted Isobaric Polynomials, and Integer Sequences, J. Int. Seq. 16 (2013) #13.3.5, example 47. Eric Weisstein's World of Mathematics, NSW Number Eric Weisstein's World of Mathematics, Integer Sequence Primes EXAMPLE NSW(1) = 7, NSW(2) = 41, NSW(3) = 239, NSW(9) = 9369319, ... MATHEMATICA nsw = LinearRecurrence[{6, -1}, {7, 41}, 1000]; Position[nsw, _?(PrimeQ[#] &)] // Flatten (* Amiram Eldar, Dec 07 2018 *) PROG (PARI) isok(n) = my(w=3+quadgen(32)); isprime(imag((1+w)*w^n)); \\ Michel Marcus, Dec 07 2018 CROSSREFS Cf. A002315, A088165, A099088. Sequence in context: A116222 A338234 A048038 * A101067 A056645 A295857 Adjacent sequences: A113498 A113499 A113500 * A113502 A113503 A113504 KEYWORD nonn,more AUTHOR Eric W. Weisstein, Jan 09 2006 EXTENSIONS a(19)-a(20) from Eric W. Weisstein, May 22 2006 a(21) from Eric W. Weisstein, Aug 29 2006 a(22) from Eric W. Weisstein, Nov 11 2006 a(23) from Eric W. Weisstein, Nov 26 2006 a(24) from Eric W. Weisstein, Dec 10 2006 a(25) from Eric W. Weisstein, Jan 25 2007 a(26) from Robert Price, Dec 07 2018 STATUS approved

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Last modified January 28 02:10 EST 2023. Contains 359849 sequences. (Running on oeis4.)