A107703 Sums of antidiagonals of number array A103209.

1, 2, 4, 11, 43, 218, 1336, 9557, 78053, 714578, 7223548, 79704015, 951626175, 12210506762, 167413540912, 2440529176297, 37665520151241, 613124748803618, 10492684074110772, 188241358671950227, 3531254422923432083

Offset

0,2

Comments

Row sums of A107702.

Links

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

Formula

a(n)=sum{k=0..n, sum{j=0..n-k, C(n-k+j, 2j)*k^j*C(k)}}, C(n) given by A000108.

Crossrefs

Sequence in context: A105996 A213937 A328437 * A140838 A114954 A134019

Adjacent sequences: A107700 A107701 A107702 * A107704 A107705 A107706

Keyword

easy,nonn

Author

Paul Barry, May 21 2005

Status

approved