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A121076
Nonisomorphic catacondensed monoheptabenzenoids (see reference for precise definition).
0
1, 1, 4, 13, 56, 231, 999, 4276, 18393
OFFSET
0,3
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: A149474 A149475 A149476 * A121070 A163070 A239981
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 11 2006
STATUS
approved