id:A103995 - OEIS Search Results

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First column of triangle A103910.

+0
2

1, -1, 0, 1, -1, -6, 35, 181, -6056, -3741, 5880885, -149991434, -32148902071, 4867910308359, 891980177502800, -740991835820243639, -53134975005564905081, 626000780698404972023994 (list; graph; listen)

	OFFSET	`1,6`
	COMMENT	`The sign of a(n) appears to follow a 7-periodic pattern.`
	FORMULA	`Recurrence: a(n) = -Sum[i=1..n-1, a(i)*A010048(n-1, i-1) ] (conjectured).`
	CROSSREFS	`Sequence in context: A026997 A014337 A002041 this_sequence A009572 A027202 A026934` `Adjacent sequences: A103992 A103993 A103994 this_sequence A103996 A103997 A103998`
	KEYWORD	`sign`
	AUTHOR	`Ralf Stephan, Feb 24 2005`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

AT&T Labs Research