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

Author

Wolfdieter Lang, Feb 27 2004

Keywords

• sign
• easy

Comments

The first negative term is the 41 digit number a(16)=-42686874251433290891296448926053802610879.

Crossrefs

Cf. A091748 (row sums of A091746).

Formula

a(n)=sum(A091746(n, k)*(-1)^k, k=2..2*n), n>=1.