A121076 Nonisomorphic catacondensed monoheptabenzenoids (see reference for precise definition).

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.

Links

Table of n, a(n) for n=0..8.

Crossrefs

Sequence in context: A149474 A149475 A149476 * A121070 A163070 A239981

Adjacent sequences: A121073 A121074 A121075 * A121077 A121078 A121079

Keyword

nonn

Author

N. J. A. Sloane, Aug 11 2006

Status

approved