A091537 Alternating row sums of array A091534 (generalized Stirling2 array (5,2)).

1, 11, 341, 19841, 1683981, 143771891, -15351301839, -27396364105599, -24059921739904039, -21285850978489377989, -20814945866103868804819, -22980130985849165090290239, -28698856680135265507625861339, -40335646598356375740067161474269

Offset: 1

Author

Wolfdieter Lang, Jan 23 2004

Keywords

• sign
• easy

Crossrefs

Cf. A072019 (row sums of A091534).

Formula

a(n)=sum(((-1)^k)*A091534(n, k), k=2..2*n), n>=1.