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

1,2

Links

Table of n, a(n) for n=1..17.

Formula

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

Crossrefs

Cf. A134276 (row sums of triangle A134275).

Sequence in context: A024383 A110041 A064327 * A085340 A230251 A001908

Adjacent sequences: A134274 A134275 A134276 * A134278 A134279 A134280

Keyword

nonn,easy

Author

Wolfdieter Lang, Nov 13 2007

Status

approved