A132059 Alternating row sums of triangle A132057 (s2(8)).

1, 27, 925, 35069, 1406679, 58491537, 2493656187, 108280678092, 4768395658314, 212335592489544, 9540877059969102, 431908789303835976, 19675192863275361294, 901089855844979674068, 41459199062515242868098

Offset

1,2

Links

Table of n, a(n) for n=1..15.

Formula

a(n) = -Sum_{m=1..n} A132057(n, m)*(-1)^m, n>=1.

G.f.: (-1 +(1-49*x)^(-1/7))/(6+(1-49*x)^(-1/7)).

Crossrefs

Cf. A092087 (alternating row sums of s2(7)=A092083).

Sequence in context: A061695 A107050 A129999 * A292362 A239571 A017019

Adjacent sequences: A132056 A132057 A132058 * A132060 A132061 A132062

Keyword

nonn,easy

Author

Wolfdieter Lang, Sep 11 2007

Status

approved