A091750 Alternating row sums of array A091746 (generalized Stirling2 array (6,2)).

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.

Links

Table of n, a(n) for n=1..13.

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

Adjacent sequences: A091747 A091748 A091749 * A091751 A091752 A091753

Keyword

sign,easy

Author

Wolfdieter Lang, Feb 27 2004

Status

approved