A139176 a(n) = (n! - 6)/6.

0, 3, 19, 119, 839, 6719, 60479, 604799, 6652799, 79833599, 1037836799, 14529715199, 217945727999, 3487131647999, 59281238015999, 1067062284287999, 20274183401471999, 405483668029439999

Offset

3,2

Comments

Original name: Natural numbers of the form (n!-6)/6.

Links

Vincenzo Librandi, Table of n, a(n) for n = 3..300

Maple

seq((factorial(n)-6)/6, n=3..25); # Muniru A Asiru, Oct 20 2018

Mathematica

Table[(n! - 6)/6, {n, 3, 20}]

Prog

(Magma) [(Factorial(n)-6)/6: n in [3..25]]; // Vincenzo Librandi, Jul 20 2011
(GAP) List([3..25], n->(Factorial(n)-6)/6); # Muniru A Asiru, Oct 20 2018

Crossrefs

Cf. A033312, A139172, A139173, A139174, A139175, A139176, A139177, A139183, A139184.

Sequence in context: A321002 A221184 A274852 * A302443 A126809 A340644

Adjacent sequences: A139173 A139174 A139175 * A139177 A139178 A139179

Keyword

nonn

Author

Artur Jasinski, Apr 11 2008

Extensions

New name from Jon E. Schoenfield, Oct 19 2018

Status

approved