Obverse convolution A000045**A000032; see Comments.

A374865

Obverse convolution A000045**A000032; see Comments.

Terms

    a(0) =2a(1) =3a(2) =18a(3) =128a(4) =2100a(5) =61600a(6) =3732480a(7) =449880480a(8) =111021510600

External references