A121140 - OEIS

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A121140

Numbers of isomers of unbranched a-4-catapolyheptagons - see Brunvoll reference for precise definition.

1, 3, 21, 116, 692, 3776, 20216, 104448 (list; graph; refs; listen; history; internal format)

	OFFSET	`3,2`
	REFERENCES	`J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 1-13.`
	CROSSREFS	`Sequence in context: A122120 A080952 A183404 * A005057 A092634 A178537` `Adjacent sequences: A121137 A121138 A121139 * A121141 A121142 A121143`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Aug 13 2006`

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Last modified February 16 13:56 EST 2012. Contains 205921 sequences.