id:A057423 - OEIS Search Results

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Diagonally symmetric n-celled polyominoes with 1 hole.

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1, 0, 5, 4, 20, 18, 79, 84, 304, 332, 1149, 1309, 4312, 5005, 16136, 19049, 60347, 71979, 225867, 271781, 846667, 1025315 (list; graph; listen)

	OFFSET	`7,3`
	LINKS	`Tomas Oliveira e Silva, Enumeration of polyominoes`
	CROSSREFS	`Sequence in context: A133167 A133173 A070374 this_sequence A167636 A038246 A024067` `Adjacent sequences: A057420 A057421 A057422 this_sequence A057424 A057425 A057426`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Sep 05 2000`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.