A134139 Alternating row sums of triangle A049353 (S1p(5)).

1, 4, 16, 44, -244, -7336, -112664, -1406336, -14058944, -66627136, 1879992896, 85070733824, 2359547577856, 54106723270144, 1055100890838016, 15611883969810944, 48348082318102016, -9055743653514520576, -521351156412528902144

Offset

1,2

Links

Table of n, a(n) for n=1..19.

Formula

a(n)=sum(A049353(n,m)*(-1)^(m-1),m=1..n), n>=1.

E.g.f.: 1-exp(-x*(2-x)*(2-2*x+x^2)/(4*(1-x)^4)). Cf. e.g.f. first column of A049353.

Crossrefs

Cf. A049378 (row sums of A049353).

Sequence in context: A217553 A225379 A359073 * A213501 A097125 A213480

Adjacent sequences: A134136 A134137 A134138 * A134140 A134141 A134142

Keyword

sign,easy

Author

Wolfdieter Lang Oct 12 2007

Status

approved