id:A128418 - OEIS Search Results

Search: id:A128418

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a(n)=sum{k=0..n, 2^(n-k)*C(2n,n-k)}.

+0
2

1, 5, 33, 233, 1697, 12585, 94449, 714873, 5445441, 41687369, 320420753, 2471008281, 19108837601, 148123058153, 1150532419377, 8952614975673, 69772391628417, 544532315255433, 4255064364533457 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Row sums of number triangle A128417.`
	FORMULA	`G.f.: 8x/(sqrt(1-8x)(sqrt(1-8x)+12x-1));`
	CROSSREFS	`Sequence in context: A164538 A083076 A162816 this_sequence A001887 A118803 A093427` `Adjacent sequences: A128415 A128416 A128417 this_sequence A128419 A128420 A128421`
	KEYWORD	`easy,nonn`
	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.

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