A374872 Obverse convolution (2n+1)**(n!); see Comments.

2, 8, 72, 1680, 126000, 38811960, 61785091368, 616892274180000, 45374160012072012000, 28175746072918961153889000, 166250736077540332478371155891000, 10349136183590980028259106116944710102320, 7466148323412227422384379930251940448396455130000

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. A005408, A000142, A374848.

Programs

Mathematica

s[n_] := 2 n + 1; t[n_] := n!;
u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
Table[u[n], {n, 0, 13}]