A056863 Related to triangle A056858 of number of rises in set partitions of n at a given index i.

1, -1, 1, -2, 1, 1, -3, 4, 2, 1, -4, 9, 10, 4, 1, -5, 16, 28, 24, 8, 1, -6, 25, 60, 80, 56, 16

Offset: 1

Author

Winston C. Yang (winston(AT)cs.wisc.edu), Aug 31 2000

Keywords

• sign
• tabf
• more
• obsc
• uned

Examples

			1,-1;
1,-2,1;
1,-3,4,2;
1,-4,9,10,4;
...
		

References

• W. C. Yang, Conjectures on some sequences involving set partitions and Bell numbers, preprint, 2000. [Apparently unpublished. - R. J. Mathar, Oct 06 2011]

Crossrefs

Cf. Bell numbers A000110.

Cf. A056857-A056862.