A121141 Numbers of isomers of unbranched a-4-catapolyheptagons - see Brunvoll reference for precise definition.

1, 5, 37, 254, 1690, 10476, 62000

Offset

4,2

References

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

Links

Table of n, a(n) for n=4..10.

Crossrefs

Sequence in context: A054417 A080507 A108049 * A331449 A220634 A083232

Adjacent sequences: A121138 A121139 A121140 * A121142 A121143 A121144

Keyword

nonn

Author

N. J. A. Sloane, Aug 13 2006

Status

approved