id:A128416 - OEIS Search Results

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Expansion of (1-4x^2)/(1+4x+3x^2).

+0
2

1, -4, 9, -24, 69, -204, 609, -1824, 5469, -16404, 49209, -147624, 442869, -1328604, 3985809, -11957424, 35872269, -107616804, 322850409, -968551224, 2905653669, -8716961004, 26150883009, -78452649024, 235357947069 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Diagonal sums of number triangle A128414.`
	CROSSREFS	`Sequence in context: A077922 A081149 A059507 this_sequence A133905 A131826 A051961` `Adjacent sequences: A128413 A128414 A128415 this_sequence A128417 A128418 A128419`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Mar 02 2007`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

AT&T Labs Research