A090159 Semiprimes of the form m! + 1.

25, 121, 721, 5041, 40321, 3628801, 6227020801, 87178291201, 121645100408832001, 2432902008176640001, 620448401733239439360001, 15511210043330985984000001, 403291461126605635584000001, 304888344611713860501504000001, 295232799039604140847618609643520000001

Offset: 1

Author

Ray Chandler, Nov 22 2003

Keywords

• nonn

Crossrefs

Cf. A038507, A078778, A082952, A090160.

Formula

a(n) = A078778(n)! + 1.

Extensions

Offset changed to 1 and more terms from Jinyuan Wang, Jul 31 2021