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A090451
Alternating row sums of triangle A090447.
2
1, 0, 1, -2, 21, -454, 25285, -3606504, 1328522713, -1270747453940, 3169192850406441, -20676520009454537480, 353872602524737587995341, -15925173912641846013871947522, 1888348697181821236021540428910349, -591053910458037676348857289166882470064
OFFSET
0,4
FORMULA
a(n)=sum(A090447(n, m)*(-1)^m, m=0..n), n>=0.
A090450 (row sums).
CROSSREFS
Sequence in context: A090310 A024232 A192666 * A199747 A303867 A238696
KEYWORD
sign,easy
AUTHOR
Wolfdieter Lang, Dec 23 2003
STATUS
approved