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A121101 Catapolyoctagons (see Cyvin et al. for precise definition). 1
1, 1, 3, 9, 39, 169, 819, 3969, 19719, 97969 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

REFERENCES

J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 1-13.

S. J. Cyvin et al., Enumeration of tree-like octagonal systems: catapolyoctagons, ACH Models in Chem. 134 (1997), 55-70.

CROSSREFS

Sequence in context: A149026 A149027 A180741 * A080635 A130905 A030799

Adjacent sequences:  A121098 A121099 A121100 * A121102 A121103 A121104

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Aug 11 2006

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Last modified February 14 22:11 EST 2012. Contains 205669 sequences.