A128602 Row sums of triangle A128567.

1, 3, 12, 60, 315, 1869, 11472, 74797, 502908, 3505031, 24973089, 182208083, 1352620790, 10207771213, 78082422354, 604699597868, 4733082767467, 37406134058641, 298165102770381, 2395219866441531, 19376637845028027, 157757577529194488, 1291926016200778464

Offset: 1

Author

Paul D. Hanna, Mar 12 2007

Keywords

• nonn

Comments

A128567 is the matrix square of Parker's partition triangle A047812.

Crossrefs

Cf. A000108, A047812, A128567, A128568 (column 1), A128569 (column 2).

Programs

PARI

{a(n)=local(M);M=matrix(n+1,n+1,r,c,if(rPetros Hadjicostas, May 31 2020

Formula

a(n) = Sum_{s=0..n-1} A047812(n,s)*A000108(s+1) for n >= 1. - Petros Hadjicostas, May 31 2020

Extensions

Offset changed by Petros Hadjicostas, May 31 2020 to agree with A128567