id:A118406 - OEIS Search Results

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Unsigned row sums of triangle A118404.

+0
3

1, 2, 2, 4, 4, 8, 14, 28, 52, 104, 206, 412, 820, 1640, 3278, 6556, 13108, 26216, 52430, 104860, 209716, 419432, 838862, 1677724, 3355444, 6710888, 13421774, 26843548, 53687092, 107374184, 214748366, 429496732, 858993460, 1717986920, 3435973838 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: A(x) = (1 - 2x^2 - 5x^4)/(1-x^4)/(1-2*x).`
	PROGRAM	`(PARI) {a(n)=polcoeff((1 - 2x^2 - 5x^4)/(1-x^4)/(1-2x+xO(x^n)), n, x)}`
	CROSSREFS	`Cf. A118404, A118405.` `Sequence in context: A000013 A064484 A063776 this_sequence A072488 A074818 A110199` `Adjacent sequences: A118403 A118404 A118405 this_sequence A118407 A118408 A118409`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Apr 27 2006`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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