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A091750
Alternating row sums of array A091746 (generalized Stirling2 array (6,2)).
1
1, 19, 1171, 151681, 33743041, 11461272931, 5499378001699, 3524209981309921, 2887597622445729121, 2916075074262560119891, 3507033649107862877516371, 4836904652902464306386484769, 7251193844710136332044143616481
OFFSET
1,2
COMMENTS
The first negative term is the 41 digit number a(16)=-42686874251433290891296448926053802610879.
FORMULA
a(n)=sum(A091746(n, k)*(-1)^k, k=2..2*n), n>=1.
CROSSREFS
Cf. A091748 (row sums of A091746).
Sequence in context: A217828 A217829 A063442 * A316332 A319025 A253127
KEYWORD
sign,easy
AUTHOR
Wolfdieter Lang, Feb 27 2004
STATUS
approved