id:A055610 - OEIS Search Results

Search: id:A055610

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A companion sequence to A011896.

+0
2

0, 0, 0, 1, 2, 5, 9, 15, 24, 36, 52, 71, 95, 123, 156, 195, 240, 292, 350, 416, 489, 570, 660, 759, 868, 986, 1115, 1254, 1404, 1566, 1740, 1927, 2126, 2339, 2565, 2805, 3060, 3330, 3616, 3917, 4235, 4569, 4920, 5289, 5676, 6082, 6506, 6950, 7413, 7896 (list; graph; listen)

	OFFSET	`0,5`
	FORMULA	`G.f.: x^3(1-x+2x^2-x^3+x^4+x^5)/((1-x)^3*(1-x^7))`
	PROGRAM	`(PARI) a(n)=ceil(n(n-1)(n-2)/14)`
	CROSSREFS	`A055610(n)=-A011896(2-n)` `Sequence in context: A014126 A019450 A098169 this_sequence A134342 A100287 A007176` `Adjacent sequences: A055607 A055608 A055609 this_sequence A055611 A055612 A055613`
	KEYWORD	`nonn`
	AUTHOR	`Michael Somos, Jun 02 2000.`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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