A090159 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A090159

Semiprimes of the form m! + 1.

3

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..15.

FORMULA

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

CROSSREFS

Cf. A038507, A078778, A082952, A090160.

Sequence in context: A362571 A198040 A141722 * A025283 A076433 A069668

Adjacent sequences: A090156 A090157 A090158 * A090160 A090161 A090162

KEYWORD

nonn

AUTHOR

Ray Chandler, Nov 22 2003

EXTENSIONS

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

STATUS

approved