id:A027801 - OEIS Search Results

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5*(n+1)*binomial(n+4,5)/2.

+0
2

5, 45, 210, 700, 1890, 4410, 9240, 17820, 32175, 55055, 90090, 141960, 216580, 321300, 465120, 658920, 915705, 1250865, 1682450, 2231460, 2922150, 3782350, 4843800, 6142500, 7719075, 9619155, 11893770, 14599760, 17800200 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`Number of 10-subsequences of [ 1, n ] with just 4 contiguous pairs; g.f. 5(1+2x)/(1-x)^7` `C(n+2, 2)C(n+5, 4) - Zerinvary Lajos (zlaja(AT)freemail.hu), May 10 2005`
	CROSSREFS	`Equals 5 * A051923.` `Sequence in context: A113948 A096763 A003185 this_sequence A079139 A081070 A043025` `Adjacent sequences: A027798 A027799 A027800 this_sequence A027802 A027803 A027804`
	KEYWORD	`nonn`
	AUTHOR	`thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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