id:A057415 - OEIS Search Results

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

+0
1

2, 10, 53, 220, 845, 2975, 9936, 31640, 97283, 290173, 844729, 2408213, 6746197, 18613290, 50688554, 136464665, 363724034, 960862781, 2518380075, 6554072749, 16949040877, 43580221577, 111475092069, 283799832989 (list; graph; listen)

	OFFSET	`13,1`
	LINKS	`I. Jensen, Table of n, a(n) for n = 13..86 (from link below)` `I. Jensen, More terms`
	CROSSREFS	`Sequence in context: A080117 A080118 A086546 this_sequence A037724 A037619 A009320` `Adjacent sequences: A057412 A057413 A057414 this_sequence A057416 A057417 A057418`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Aug 30 2000`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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