A192458 a(n) = A192457(n)/2.

0, 1, 7, 59, 605, 7365, 104055, 1675275, 30290085, 607828725, 13406691375, 322415322075, 8396547684525, 235419569309925, 7070492932878375, 226469231898784875, 7706144167912315125, 277613088828805855125, 10555630035365385345375

Offset

0,3

Comments

See A192457.

Links

Table of n, a(n) for n=0..18.

Formula

a(n) = (1/3)*(2^n(n+1)! - (2n-1)!!). - Vaclav Potocek, Feb 04 2016

Example

(See A192457.)

Mathematica

(See A192457.)

Crossrefs

Cf. A192457.

Sequence in context: A358599 A135150 A077409 * A203237 A099347 A331709

Adjacent sequences: A192455 A192456 A192457 * A192459 A192460 A192461

Keyword

nonn

Author

Clark Kimberling, Jul 01 2011

Status

approved