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A121332 Number of bridged bicyclic skeletons with n carbon atoms (see Parks et al. for precise definition). 5
0, 1, 5, 20, 71, 235, 753, 2345, 7190, 21753, 65188, 193834, 527743, 1683615, 4927394, 14367845, 41761634, 121052806, 350049108, 1010123293, 2909478000 (list; graph; refs; listen; history; text; internal format)
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: A056384 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

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Last modified January 15 20:47 EST 2019. Contains 319184 sequences. (Running on oeis4.)