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A273519
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Numbers n such that 7*14^n-1 is prime.
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0
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1, 3, 5, 7, 9, 21, 39, 59, 99, 323, 331, 359, 617, 2529
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..13.
J. Brillhart, D. H. Lehmer and J. L. Selfridge, New primality criteria and factorizations of 2^m+-1, Math. Compl. 29 (1975) 620-647.
John Eisenmann, Prime Numbers of the Form a * 14^b - 1.
Victor Shoup, A Computational Introduction to Number Theory and Algebra, 2008, page 348.
Eric Weisstein's World of Mathematics, Lucas Sequence.
Eric Weisstein's World of Mathematics, Rabin-Miller Strong Pseudoprime Test.
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PROG
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(PARI) is(n)=ispseudoprime(7*14^n-1) \\ Charles R Greathouse IV, Jun 08 2016
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CROSSREFS
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Sequence in context: A076185 A101813 A134719 * A241175 A342729 A099995
Adjacent sequences: A273516 A273517 A273518 * A273520 A273521 A273522
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KEYWORD
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nonn,more
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AUTHOR
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Jack P. Eisenmann, May 23 2016
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STATUS
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approved
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