A057419 - OEIS

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A057419

Number of fixed n-celled polyominoes with 1 hole.

4, 41, 272, 1516, 7688, 36726, 168528, 751742, 3284460, 14127796, 60040812, 252749460, 1055898224, 4383854044, 18107682684, 74474755264, 305200110920, 1246872556159, 5080537687912, 20653896398652 (list; graph; refs; listen; history; internal format)

	OFFSET	`7,1`
	LINKS	`Tomas Oliveira e Silva, Enumeration of polyominoes`
	CROSSREFS	`Sequence in context: A068169 A069631 A069616 * A089664 A089454 A193368` `Adjacent sequences: A057416 A057417 A057418 * A057420 A057421 A057422`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Sep 05 2000`

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Last modified February 15 05:45 EST 2012. Contains 205694 sequences.