A115136 Row sums of triangle A113647.

1, 4, 21, 124, 773, 4988, 33029, 223228, 1533957, 10686460, 75309061, 535920636, 3845881861, 27800469500, 202244161541, 1479594737660, 10878806654981, 80345708888060, 595788935725061, 4434080431079420, 33109442115403781

Offset: 0

Author

Wolfdieter Lang, Jan 13 2006

Keywords

• nonn
• easy

Formula

a(n)=sum(A113647(n, m), m=1..n+1), n>=0.

Conjecture: (n+2)*a(n) +(-11*n-4)*a(n-1) +(25*n-42)*a(n-2) +5*(-n+12)*a(n-3) +2*(-13*n+20)*a(n-4) +8*(2*n-7)*a(n-5)=0. - R. J. Mathar, Nov 10 2013