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

0,2

Links

Table of n, a(n) for n=0..20.

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

Crossrefs

Sequence in context: A103769 A003014 A108404 * A364866 A101478 A153291

Adjacent sequences: A115133 A115134 A115135 * A115137 A115138 A115139

Keyword

nonn,easy

Author

Wolfdieter Lang, Jan 13 2006

Status

approved