A121333 Number of bridged bicyclic skeletons with n carbon atoms (see Parks et al. for precise definition).

0, 0, 0, 1, 6, 32, 140, 567, 2141, 7731, 26929, 91269, 302566, 985178, 3160480, 10013151, 31390529, 97519183, 300596765, 920275456, 2800635344

Offset

5,5

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: A203324 A027217 A245128 * A243026 A242542 A046725

Adjacent sequences: A121330 A121331 A121332 * A121334 A121335 A121336

Keyword

nonn

Author

N. J. A. Sloane, Aug 27 2006

Status

approved