OFFSET
0,2
COMMENTS
See A374848 for the definition of obverse convolution and a guide to related sequences.
FORMULA
a(n) ~ 2^(3/2) * n^(2*n + 1/2) / exp(2*n + 2 - Pi*sqrt(2*n)). - Vaclav Kotesovec, Sep 15 2024
MATHEMATICA
s[n_] := n^2; t[n_] := 2 n + 1;
u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
Table[u[n], {n, 0, 20}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Sep 14 2024
STATUS
approved