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A256509 a(n) = (n!)! - n! - 1. 1
-1, -1, -1, 713, 620448401733239439359975 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 10 08:09 EDT 2021. Contains 342845 sequences. (Running on oeis4.)