A121112 - OEIS

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A121112

Edge-rooted tree-like octagonal systems (see Cyvin reference for precise definition).

0, 5, 25, 155, 1080, 8085, 63525, 516790, 4315805, 36786385 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	REFERENCES	`S. J. Cyvin et al., Enumeration of tree-like octagonal systems: catapolyoctagons, ACH Models in Chem. 134 (1997), 55-70.`
	CROSSREFS	`Sequence in context: A200031 A092166 A204209 * A090014 A179324 A097145` `Adjacent sequences: A121109 A121110 A121111 * A121113 A121114 A121115`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Aug 13, 2006`

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Last modified February 16 21:14 EST 2012. Contains 205971 sequences.