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URL: https://oeis.org/A134831

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A134831
Alternating row sums of triangle A134830.
1
1, 1, 2, 0, 12, -26, 312, -1338, 16684, -104994, 1463904, -12138218, 190104132, -1956240066, 34206491416, -420374124426, 8140714373532, -116318340148898, 2474986205007504, -40312051604277354
OFFSET
0,3
FORMULA
a(n) = Sum_{k=1..n+1} A134830(n,k)*(-1)^(k-1), n>=0.
CROSSREFS
Cf. A134830.
Sequence in context: A349932 A002929 A112261 * A074001 A228621 A180189
KEYWORD
sign,easy
AUTHOR
Wolfdieter Lang, Jan 21 2008
STATUS
approved