a(n) = (-1)^n * n! * Laguerre(n, 6*n).

A332695

a(n) = (-1)^n * n! * Laguerre(n, 6*n).

Terms

    a(0) =1a(1) =5a(2) =98a(3) =3234a(4) =149784a(5) =8927880a(6) =650696400a(7) =56061791856

External references