id:A057416 - OEIS Search Results

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Number of staircase polygons of area n with 3 (staircase polygon) holes on square lattice (not allowing rotations).

+0
1

4, 30, 184, 894, 3885, 15386, 56956, 199620, 669702, 2166462, 6798186, 20786496, 62160079, 182336358, 525931258, 1494726848, 4192885357, 11625457180, 31899800729, 86717361496, 233754981005, 625311996048 (list; graph; listen)

	OFFSET	`18,1`
	LINKS	`I. Jensen, Table of n, a(n) for n = 18..89 (from link below)` `I. Jensen, More terms`
	CROSSREFS	`Sequence in context: A119697 A132849 A115867 this_sequence A089154 A113450 A094567` `Adjacent sequences: A057413 A057414 A057415 this_sequence A057417 A057418 A057419`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Aug 30 2000`

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

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