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 A240105 Integers n such that 2n^k + 1, for k = 2..7, are prime. 0
 1, 3490575, 83972646, 414180489, 476072025, 1881147720, 3020243916, 3188924769, 3285167214, 3543143220 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS First n>1 such that 2n^k+1, for k=2..8, are prime, is a(3) = 83972646. Subsequence of A240099: a(2) = 3490575 = A240099(4), a(3) = 83972646 = A240099(22). LINKS Table of n, a(n) for n=1..10. CROSSREFS Cf. A089001, A168550, A239874, A239925, A240099. Sequence in context: A349065 A204335 A365888 * A205766 A183790 A256770 Adjacent sequences: A240102 A240103 A240104 * A240106 A240107 A240108 KEYWORD nonn,more AUTHOR Zak Seidov, Apr 01 2014 STATUS approved

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Last modified June 25 03:44 EDT 2024. Contains 373694 sequences. (Running on oeis4.)