A127086 Column 3 of triangle A127082.

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

G. C. Greubel, Table of n, a(n) for n = 3..80

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

Cf. A127082.

Columns of A127082: A127083, A127084, A127085.

Cf. A127087, A127088, A127089, A127090, A127091.

Sequence in context: A213101 A084211 A114496 * A198024 A278393 A349361

Adjacent sequences: A127083 A127084 A127085 * A127087 A127088 A127089

Keyword

nonn

Author

Paul D. Hanna, Jan 04 2007

Status

approved