A256509 a(n) = (n!)! - n! - 1.

-1, -1, -1, 713, 620448401733239439359975

Offset

0,4

Comments

Term a(5) has 199 decimal digits. - Michael De Vlieger, Mar 31 2015

Links

Table of n, a(n) for n=0..4.

Example

a(3) = (3!)! - 3! - 1 = 720 - 6 - 1 = 713.

Mathematica

Table[(n!)! - n! - 1, {n, 0, 5}] (* Michael De Vlieger, Mar 31 2015 *)

Crossrefs

Sequence in context: A269060 A265142 A251031 * A259674 A321493 A260282

Adjacent sequences: A256506 A256507 A256508 * A256510 A256511 A256512

Keyword

sign

Author

Assoul Abdelkarim, Mar 31 2015

Status

approved