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%I #8 Apr 04 2024 12:45:03
%S 1,1,6,12,43,106,322,864,2483,6829,19226,53293,148866,413501,1151506,
%T 3200184,8901478,24742852,68800520,191275736,531888416
%N Number of spiro bicyclic skeletons with n carbon atoms (see Parks et al. for precise definition).
%H Camden A. Parks and James B. Hendrickson, <a href="https://doi.org/10.1021/ci00002a021">Enumeration of monocyclic and bicyclic carbon skeletons</a>, J. Chem. Inf. Comput. Sci., vol. 31, 334-339 (1991).
%K nonn,more
%O 5,3
%A _Parthasarathy Nambi_, Aug 13 2006
%E More terms from _N. J. A. Sloane_, Aug 27 2006