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%I #11 Feb 16 2023 14:45:29
%S 0,0,0,0,0,1,5,35,200,1121,5919,30509,153187,756825,3688195
%N Hexagonal cata-condensed helicenes with n cells (non-planar cata-fused benzenoid hydrocarbons).
%H J. V. Knop, K. Szymanski, Ž. Jeričević, and N. Trinajstić, <a href="http://match.pmf.kg.ac.rs/electronic_versions/Match16/match16_119-134.pdf">On the total number of polyhexes</a>, Match, No. 16 (1984), 119-134.
%Y Equals A002216-A038142. Cf. A018190.
%K nonn,more
%O 1,7
%A _N. J. A. Sloane_
%E a(12)-a(15) from _Andrey Zabolotskiy_, Feb 16 2023
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