A374893 Obverse convolution (n)**A000984; see Comments.

1, 4, 54, 2240, 294000, 127534176, 189691951680, 994556567347200, 18760374808177860000, 1292781708803753625600000, 329281303607781567523264143360, 312866979311142515971112580848148480, 1117139877664193310898467728367016525532160

Offset: 0

Author

Clark Kimberling, Sep 14 2024

Keywords

• nonn

Comments

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

Crossrefs

Cf. A000027, A000893, A374848.

Programs

Mathematica

s[n_] := n; t[n_] := Binomial[2 n, n];
u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
Table[u[n], {n, 0, 14}]