id:A105450 - OEIS Search Results

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Binomial(n+5,6) + binomial(n+3,3) + binomial(n+2,3) + binomial(n-1,1).

+0
5

0, 6, 22, 60, 142, 305, 607, 1134, 2008, 3396, 5520, 8668, 13206, 19591, 28385, 40270, 56064, 76738, 103434, 137484, 180430, 234045, 300355, 381662, 480568, 600000, 743236, 913932, 1116150, 1354387, 1633605, 1959262, 2337344, 2774398, 3277566, 3854620 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Number of directed column-convex polyominoes with perimeter 2(n+4) having n cells in the foundational column.` `A051743 and this sequence form successive diagonals in an array that has as row sums the sequence A006027.`
	CROSSREFS	`Cf. A051743, A006027, A051743.` `Sequence in context: A127760 A066188 A071239 this_sequence A011888 A081282 A001769` `Adjacent sequences: A105447 A105448 A105449 this_sequence A105451 A105452 A105453`
	KEYWORD	`nonn`
	AUTHOR	`Douglas G. Rogers (douglas(AT)mi.uib.no), May 07 2005`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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