A134831 Alternating row sums of triangle A134830.

1, 1, 2, 0, 12, -26, 312, -1338, 16684, -104994, 1463904, -12138218, 190104132, -1956240066, 34206491416, -420374124426, 8140714373532, -116318340148898, 2474986205007504, -40312051604277354

Offset: 0

Author

Wolfdieter Lang, Jan 21 2008

Keywords

• sign
• easy

Crossrefs

Cf. A134830.

Formula

a(n) = Sum_{k=1..n+1} A134830(n,k)*(-1)^(k-1), n>=0.