A121332 Number of bridged bicyclic skeletons with n carbon atoms (see Parks et al. for precise definition).

0, 1, 5, 20, 71, 235, 753, 2345, 7190, 21753, 65188, 193834, 527743, 1683615, 4927394, 14367845, 41761634, 121052806, 350049108, 1010123293, 2909478000

Offset

5,3

References

Camden A. Parks and James B. Hendrickson, Enumeration of monocyclic and bicyclic carbon skeletons, J. Chem. Inf. Comput. Sci., vol. 31, 334-339 (1991).

Links

Table of n, a(n) for n=5..25.

Crossrefs

Sequence in context: A369818 A036683 A054444 * A122695 A269914 A066822

Adjacent sequences: A121329 A121330 A121331 * A121333 A121334 A121335

Keyword

nonn

Author

N. J. A. Sloane, Aug 27 2006

Status

approved