id:A006535 - OEIS Search Results

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Number of one-sided hexagonal polyominoes with n cells.
(Formerly M2846)

+0
3

1, 1, 3, 10, 33, 147, 620, 2821, 12942, 60639, 286190, 1364621, 6545430, 31586358, 153143956, 745700845, 3644379397, 17869651166, 87877879487, 433301253231 (list; graph; listen)

	OFFSET	`1,3`
	REFERENCES	`J. Meeus, personal communication.`
	LINKS	`Ed Pegg, Jr., Illustrations of polyforms` `Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	CROSSREFS	`A006535 = 2*A000228 - A030225.` `Adjacent sequences: A006532 A006533 A006534 this_sequence A006536 A006537 A006538` `Sequence in context: A149030 A149031 A145928 this_sequence A041633 A034215 A083580`
	KEYWORD	`hard,nonn,nice`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from David W. Wilson (davidwwilson(AT)comcast.net). a(13) from Achim Flammenkamp (achim(AT)uni-bielefeld.de) Feb 15 1999.` `More terms from Joseph Myers (jsm(AT)polyomino.org.uk), Sep 21 2002`

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Last modified July 4 09:27 EDT 2009. Contains 160562 sequences.

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