OFFSET
0,1
COMMENTS
See A374848 for the definition of obverse convolution and a guide to related sequences.
FORMULA
a(n) ~ 3^(3*(n+1)/2) * n^(n+1) / exp(n). - Vaclav Kotesovec, Aug 28 2024
MATHEMATICA
s[n_] := n; t[n_] := 3 n + 2;
u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
Table[u[n], {n, 0, 20}]
(* or *)
Table[2^n*(n+2)*Pochhammer[2 + n/2, n], {n, 0, 20}] (* Vaclav Kotesovec, Aug 28 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Aug 28 2024
STATUS
approved