A374871 Obverse convolution (n)**(n!); see Comments.

1, 2, 12, 216, 13440, 3600000, 5137292160, 46921886323200, 3202231533127925760, 1864324101234676309401600, 10395949648645451956665600000000, 615427797319269256611285148820828160000, 424360339875987535547553745155503616043253760000

Offset: 0

Author

Clark Kimberling, Aug 28 2024

Keywords

• nonn

Comments

See A374848 for the definition of obverse convolution and a guide to related sequences.

Crossrefs

Cf. A000027, A000142, A374848.

Programs

Mathematica

s[n_] := n; t[n_] := n!;
u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
Table[u[n], {n, 0, 13}]