A134277 Alternating row sums of triangle A134275 (S2(5)').

1, 4, 41, 519, 9201, 194819, 4951381, 144651394, 4811109506, 178860848394, 7364318416206, 332403272058269, 16329673772560231, 867235540509998269, 49517829071816599856, 3024950770151869836519, 196866838411908745248981

Offset: 1

Author

Wolfdieter Lang, Nov 13 2007

Keywords

• nonn
• easy

Crossrefs

Cf. A134276 (row sums of triangle A134275).

Formula

a(n) = Sum_{m=1..n} A134275(n,m)*(-1)^(m-1), n>=1.