id:A057413 - OEIS Search Results

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Number of staircase polygons of perimeter 2n with any number of (staircase polygon) holes on square lattice (not allowing rotations).

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1, 2, 5, 14, 42, 132, 430, 1442, 4956, 17400, 62251, 226506, 836911, 3136182, 11906908, 45761338, 177903128, 699167112, 2776219871, 11132523840, 45062497156, 184057276510, 758328417263, 3150593560374, 13195743501195 (list; graph; listen)

	OFFSET	`2,2`
	LINKS	`I. Jensen, Table of n, a(n) for n = 1..51 (from link below)` `I. Jensen, More terms`
	CROSSREFS	`Sequence in context: A000108 A115140 A120588 this_sequence A126567 A125501 A126569` `Adjacent sequences: A057410 A057411 A057412 this_sequence A057414 A057415 A057416`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Aug 30 2000`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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