A090451 Alternating row sums of triangle A090447.

1, 0, 1, -2, 21, -454, 25285, -3606504, 1328522713, -1270747453940, 3169192850406441, -20676520009454537480, 353872602524737587995341, -15925173912641846013871947522, 1888348697181821236021540428910349, -591053910458037676348857289166882470064

Offset: 0

Author

Wolfdieter Lang, Dec 23 2003

Keywords

• sign
• easy

Formula

a(n)=sum(A090447(n, m)*(-1)^m, m=0..n), n>=0.

A090450 (row sums).