A091750 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

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