A030227 - OEIS

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A030227

Number of n-celled polyominoes with bilateral symmetry.

1, 1, 2, 3, 6, 10, 20, 34, 70, 121, 250, 441, 912, 1630, 3375, 6092, 12624, 22961, 47616, 87136, 180811, 332549 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	COMMENTS	`Polyominoes with n cells and at least one line of reflection symmetry. - Joshua Zucker, Mar 08 2008`
	CROSSREFS	`Cf. A000105, A006746.` `Sequence in context: A135452 A077027 A030436 * A180272 A061551 A026034` `Adjacent sequences: A030224 A030225 A030226 * A030228 A030229 A030230`
	KEYWORD	`nonn`
	AUTHOR	`Dave Wilson`

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Last modified February 17 14:19 EST 2012. Contains 206038 sequences.