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A270011 Numbers n such that 3*14^n-1 is prime. 0
1, 2, 3, 5, 15, 31, 53, 100, 108, 188, 328, 568, 816, 1013, 1912, 4008, 4155, 8686, 10747 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..18.

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.

PROG

(PARI) is(n)=ispseudoprime(3*14^n-1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A340643 A120755 A227633 * A111183 A330821 A248827

Adjacent sequences:  A270008 A270009 A270010 * A270012 A270013 A270014

KEYWORD

nonn,more

AUTHOR

Jack P. Eisenmann, May 23 2016

STATUS

approved

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Last modified March 8 01:41 EST 2021. Contains 341934 sequences. (Running on oeis4.)