A256669 a(n) = (n!)! - n! - n.

0, -1, -2, 711, 620448401733239439359972

Offset

0,3

Comments

For n>0, a(n) is divisible by n. - Michel Marcus, Apr 08 2015

Links

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

Example

For n=3, a(3) = (3!)!-3!-3 = 6!-6-3 = 720-9 = 711.

Maple

A256669:=n->(n!)!-n!-n: seq(A256669(n), n=0..5); # Wesley Ivan Hurt, Apr 14 2015

Mathematica

Table[(n!)! - n! - n, {n, 5}] (* Michael De Vlieger, Apr 07 2015 *)

Prog

(Magma) [Factorial(Factorial(n))-Factorial(n)-n: n in [0..5]]; // Vincenzo Librandi, Apr 08 2015
(Sage) [factorial(factorial(n))-factorial(n)-n for n in [0..6]] # Bruno Berselli, Apr 08 2015

Crossrefs

Cf. A256509.

Sequence in context: A115474 A064976 A062665 * A361451 A159564 A185667

Adjacent sequences: A256666 A256667 A256668 * A256670 A256671 A256672

Keyword

sign

Author

Assoul Abdelkarim, Apr 07 2015

Status

approved