a(n) = n-th sept-factorial number divided by 2.

A034829

a(n) = n-th sept-factorial number divided by 2.

Terms

    a(0) =1a(1) =9a(2) =144a(3) =3312a(4) =99360a(5) =3676320a(6) =161758080a(7) =8249662080a(8) =478480400640

External references