id:A126983 - OEIS Search Results

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Expansion of 1/(1+x*c(x)), c(x) the g.f. of Catalan numbers A000108.

+0
6

1, -1, 0, -1, -2, -6, -18, -57, -186, -622, -2120, -7338, -25724, -91144, -325878, -1174281, -4260282, -15548694, -57048048, -210295326, -778483932, -2892818244, -10786724388, -40347919626, -151355847012, -569274150156 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Hankel transform is (-1)^n.` `Catalan transform of A033999. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 11 2008]`
	FORMULA	`a(n)=(-1)^nA064310(n) . a(n)=Sum_{k, 0<=k<=n}A039599(n,k)(-2)^k.`
	CROSSREFS	`Sequence in context: A071721 A125306 A064310 this_sequence A104629 A000957 A125305` `Adjacent sequences: A126980 A126981 A126982 this_sequence A126984 A126985 A126986`
	KEYWORD	`sign`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Mar 21 2007`

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Last modified November 22 20:51 EST 2009. Contains 167312 sequences.

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