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A122671 Number of catacondensed coronoid systems with n hexagons. 0
1, 3, 15, 62, 312, 1435, 6785 (list; graph; refs; listen; history; internal format)
OFFSET

8,2

REFERENCES

S. J. Cyvin et al., The simplest coronoids: hollow hexagons, Struct. Chem., 2 (1991), 555-566.

CROSSREFS

Sequence in context: A128237 A058749 A072336 * A067562 A062211 A204086

Adjacent sequences:  A122668 A122669 A122670 * A122672 A122673 A122674

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Sep 23 2006

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Last modified February 17 02:08 EST 2012. Contains 205978 sequences.