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A121328
Number of bridged bicyclic skeletons with n carbon atoms (see Parks et al. for precise definition).
0
1, 2, 6, 15, 41, 106, 288, 777, 2113, 5772, 15817, 43422, 119444, 329003, 907181, 2503971, 6916822, 19120891, 52892130, 146399126, 405437427
OFFSET
5,2
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).
CROSSREFS
Sequence in context: A303551 A180666 A280788 * A348012 A139379 A236110
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 27 2006
STATUS
approved