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A127086
Column 3 of triangle A127082.
10
1, 4, 26, 192, 1551, 13416, 122770, 1180496, 11883079, 124992672, 1372811900, 15741602608, 188470662702, 2356327731016, 30760057620142, 419124712458444, 5956905826561685, 88230307480324360, 1360309585677285312
OFFSET
3,2
COMMENTS
Convolution 4th power of A127089.
LINKS
MATHEMATICA
T[n_, k_]:= T[n, k]= If[k==n, 1, Coefficient[(1 + x*Sum[x^(r-k)*Sum[T[r, c], {c, k, r}], {r, k, n-1}] + x^(n+1))^(k+1), x, n-k]]; Table[T[n, 3], {n, 3, 25}] (* G. C. Greubel, Jan 30 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jan 04 2007
STATUS
approved