id:A124820 - OEIS Search Results

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

+0
3

1, 3, 9, 28, 88, 277, 872, 2745, 8641, 27201, 85626, 269542, 848491, 2670964, 8407925, 26467299, 83316385, 262271568, 825604416, 2598919345, 8181135700, 25753389181, 81069068969, 255197244033, 803335158406, 2528817970494 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Row sums of A124819.`
	FORMULA	`a(n)=sum{k=0..n, C(n+2k+1,3k+1)}` `a(n)=A052529(n+1)-A052529(n), n>1. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 15 2008]`
	CROSSREFS	`Sequence in context: A115239 A118365 A095716 this_sequence A022020 A049220 A094790` `Adjacent sequences: A124817 A124818 A124819 this_sequence A124821 A124822 A124823`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Nov 08 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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