id:A057420 - OEIS Search Results

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Axially symmetric n-celled polyominoes with 1 hole.

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1, 3, 8, 25, 45, 137, 221, 650, 1006, 2857, 4370, 12050, 18417, 49516, 76037, 200184, 309411, 800440, 1245934, 3176482 (list; graph; listen)

	OFFSET	`9,2`
	LINKS	`Tomas Oliveira e Silva, Enumeration of polyominoes`
	CROSSREFS	`Sequence in context: A002104 A102919 A102476 this_sequence A076049 A026970 A026980` `Adjacent sequences: A057417 A057418 A057419 this_sequence A057421 A057422 A057423`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Sep 05 2000`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.