A144281 Row sums of triangle A144280 (called S2hat(-3)).

1, 4, 25, 265, 3793, 70789, 1600429, 42811078, 1316981794, 45858363502, 1781106761686, 76349861206627, 3579325969675135, 182170488961796899, 10002072131444031160, 589261706147357617009, 37076870479319887575253, 2481442922857293505594237

Offset: 1

Author

Wolfdieter Lang, Oct 09 2008

Keywords

• nonn
• easy

Crossrefs

Cf. A144280.

Formula

a(n) = Sum_{m=1..n} A144280(n,m), n>=1.