A134140 Alternating row sums of triangle A049374 (S1p(6)).

1, 5, 25, 95, -275, -14755, -278795, -4134145, -49014215, -304537195, 7111142545, 397535340575, 12667519999525, 327297915798125, 7052174242084525, 109425656597938175, -88497453300450575, -107470322009554282075, -6297063330456696598775

Offset

1,2

Links

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

Formula

a(n) = Sum_{m=1..n} A049374(n,m)*(-1)^(m-1), n>=1.

E.g.f.: 1-exp(-(1-(1-x)^5)/(5*(1-x)^5)). Cf. e.g.f. first column of A049374.

Crossrefs

Cf. A049402 (row sums of A049374).

Sequence in context: A297452 A147177 A057255 * A225011 A228457 A213293

Adjacent sequences: A134137 A134138 A134139 * A134141 A134142 A134143

Keyword

sign,easy

Author

Wolfdieter Lang Oct 12 2007

Status

approved