(n-1)-st elementary symmetric function of (1!,...,(n-1)!).

A203228

(n-1)-st elementary symmetric function of (1!,...,(n-1)!).

Terms

    a(0) =1a(1) =3a(2) =20a(3) =492a(4) =59328a(5) =42750720a(6) =215488512000

External references