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A121077 Nonisomorphic catacondensed monoheptahelicenes (see reference for precise definition). 0
3, 34, 293, 2090 (list; graph; refs; listen; history; internal format)
OFFSET

5,1

REFERENCES

B. N. Cyvin et al., A class of polygonal systems representing polycyclic conjugated hydrocarbons ..., Monat. f. Chemie, 125 (1994), 1327-1337.

CROSSREFS

Sequence in context: A042041 A180775 A141789 * A024396 A066265 A134491

Adjacent sequences:  A121074 A121075 A121076 * A121078 A121079 A121080

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 19:12 EST 2012. Contains 206085 sequences.