id:A118405 - OEIS Search Results

Search: id:A118405

Displaying 1-1 of 1 results found.

page 1

Row sums of triangle A118404.

+0
3

1, 0, 0, -2, 4, -6, 12, -26, 52, -102, 204, -410, 820, -1638, 3276, -6554, 13108, -26214, 52428, -104858, 209716, -419430, 838860, -1677722, 3355444, -6710886, 13421772, -26843546, 53687092, -107374182, 214748364, -429496730, 858993460, -1717986918, 3435973836, -6871947674 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`G.f.: A(x) = (1+x)^2/(1+x^2)/(1+2*x).`
	PROGRAM	`(PARI) {a(n)=polcoeff((1+x)^2/(1+x^2)/(1+2x+xO(x^n)), n, x)}`
	CROSSREFS	`Cf. A118404, A118406.` `Sequence in context: A036484 A093036 A087997 this_sequence A095912 A143474 A087902` `Adjacent sequences: A118402 A118403 A118404 this_sequence A118406 A118407 A118408`
	KEYWORD	`sign`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Apr 27 2006`

page 1

Search completed in 0.002 seconds

Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

AT&T Labs Research