A079286 a(n) = (3^n)! - (2^n)!.

0, 4, 362856, 10888869450418352160767959680

Offset

0,2

Comments

Sum_{n>0} 1/a(n) = 0.25000275591...

The next term is too large to include.

The next term (a(4)) has 121 digits. - Harvey P. Dale, Jan 10 2024

Links

Amiram Eldar, Table of n, a(n) for n = 0..5

Formula

a(n) = A079288(n) - A000722(n). - Michel Marcus, Jul 08 2024

Mathematica

Table[(3^n)!-(2^n)!, {n, 0, 4}] (* Harvey P. Dale, Jan 10 2024 *)

Prog

(PARI) atonfact(n) = {for(x=0, n, y = (3^x)!-(2^x)!; print1(y, ", ")); }

Crossrefs

Cf. A000722, A079288.

Sequence in context: A260614 A300286 A058430 * A275685 A124119 A090096

Adjacent sequences: A079283 A079284 A079285 * A079287 A079288 A079289

Keyword

easy,nonn

Author

Cino Hilliard, Feb 08 2003

Status

approved