A121070 Nonisomorphic catacondensed monoheptafusenes (see reference for precise definition).

1, 1, 4, 13, 56, 234, 1034, 4570, 20492, 92329, 418896

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 (see Table 1).

Links

Table of n, a(n) for n=0..10.

Crossrefs

Equals sum of columns of triangle whose successive columns are A000007, A044045, A121071, A045904, ...

Sequence in context: A149475 A149476 A121076 * A163070 A239981 A243549

Adjacent sequences: A121067 A121068 A121069 * A121071 A121072 A121073

Keyword

nonn

Author

N. J. A. Sloane, Aug 10 2006

Status

approved