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

Author

Wolfdieter Lang Oct 12 2007

Keywords

• sign
• easy

Crossrefs

Cf. A049402 (row sums of A049374).

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.