A273519 Numbers n such that 7*14^n-1 is prime.

1, 3, 5, 7, 9, 21, 39, 59, 99, 323, 331, 359, 617, 2529

Offset

0,2

Links

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.

Prog

(PARI) is(n)=ispseudoprime(7*14^n-1) \\ Charles R Greathouse IV, Jun 08 2016

Crossrefs

Sequence in context: A076185 A101813 A134719 * A241175 A342729 A099995

Adjacent sequences: A273516 A273517 A273518 * A273520 A273521 A273522

Keyword

nonn,more

Author

Jack P. Eisenmann, May 23 2016

Status

approved