A374648 a(n) = n! / (floor(n/3))! - n! / (floor(n/2))!.

0, 0, 0, 0, 12, 60, 240, 1680, 18480, 45360, 574560, 6320160, 19293120, 250810560, 3615131520, 10637827200, 173837664000, 2955240288000, 8874542476800, 168616307059200, 3378360124339200, 10123012406707200, 222987858828134400, 5128720753047091200

Offset: 0

Author

Clark Kimberling, Jul 25 2024

Keywords

• nonn

Crossrefs

Cf. A000142, A081125, A355988.

Programs

Mathematica

Table[n!/(Floor[n/3]!) - n!/(Floor[n/2]!), {n, 0, 24}]

Formula

a(n) = A355988(n) - A081125(n). - Vaclav Kotesovec, Jul 27 2024