%I #3 Mar 30 2012 16:50:30
%S 0,1,5,20,71,235,753,2345,7190,21753,65188,193834,527743,1683615,
%T 4927394,14367845,41761634,121052806,350049108,1010123293,2909478000
%N Number of bridged bicyclic skeletons with n carbon atoms (see Parks et al. for precise definition).
%D Camden A. Parks and James B. Hendrickson, Enumeration of monocyclic and bicyclic carbon skeletons, J. Chem. Inf. Comput. Sci., vol. 31, 334-339 (1991).
%K nonn
%O 5,3
%A _N. J. A. Sloane_, Aug 27 2006
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