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

Author

N. J. A. Sloane, Aug 27 2006

Keywords

• nonn

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).