A059675 Numbers n such that n*6^n - 1 is prime.

1, 2, 3, 19, 20, 24, 34, 77, 107, 114, 122, 165, 530, 1999, 4359, 11842, 12059, 13802, 22855, 41679, 58185, 145359, 249987

Offset: 1

Author

Robert G. Wilson v, Feb 05 2001

Keywords

• nonn

Links

• Steven Harvey, Generalized Woodall Search

Programs

Mathematica

Do[ If[ PrimeQ[ n*6^n - 1 ], Print[ n ] ], {n, 1, 3500} ]

PARI

is(n)=ispseudoprime(n*6^n-1) \\ Charles R Greathouse IV, May 22 2017

Extensions

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008

a(22)-a(23) from Harvey link by Ray Chandler, Apr 10 2016