A063508 Numbers n such that !n + 2n - 1 is prime.

1, 2, 4, 5, 7, 13, 40, 124, 758, 940

Offset: 1

Author

Robert G. Wilson v, Aug 09 2001

Keywords

• nonn

Crossrefs

Cf. A063106.

Programs

Mathematica

Do[ If[ PrimeQ[ Sum[ k!, {k, 0, n - 1} ] + 2n - 1 ], Print[ n ] ], {n, 1, 883} ]