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%I #10 Jun 26 2022 23:55:38
%S 1,1,3,10,37,149,630,2713,11899,52789,236345,1066317,4842531,22117897,
%T 101535659,468233674,2168094625,10076216851,46986691678,219777820957,
%U 1030892924479,4848040645676,22853639788127,107970205586283
%N Catafusenes (see reference for precise definition).
%D S. J. Cyvin et al., Enumeration and classification of certain polygonal systems...: annelated catafusenes, J. Chem. Inform. Comput. Sci., 34 (1994), 1174-1180.
%F G.f.: (6 - 18x^3 - (1-x)*(1-2x)*f(x) - 3*(1+2x)*f(x^2) - 2*f(x^3))/(12x^3), where f(x) = sqrt(1 - 6x + 5x^2) (follows from eq. (26) in Cyvin et al.).
%K nonn
%O 0,3
%A _N. J. A. Sloane_
%E More terms from _Emeric Deutsch_, Mar 14 2004
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