Lah numbers: a(n) = n!*binomial(n-1,6)/7!.

A111597

Lah numbers: a(n) = n!*binomial(n-1,6)/7!.

Terms

    a(0) =1a(1) =56a(2) =2016a(3) =60480a(4) =1663200a(5) =43908480a(6) =1141620480a(7) =29682132480a(8) =779155977600

External references