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%I #8 Feb 16 2023 14:55:45
%S 0,0,0,1,4,16,50,158,472,1406,4111,11998,34781,100660,290464,837137,
%T 2408914,6925100,19888057,57071610
%N Unbranched catafusenes, unsymmetrical.
%H A. T. Balaban, J. Brunvoll, B. N. Cyvin, and S. J. Cyvin, <a href="https://doi.org/10.1016/S0040-4020(01)85110-3">Enumeration of branched catacondensed benzenoid hydrocarbons and their numbers of Kekulé structures</a>, Tetrahedron 44(1) (1988), 221-228. See Table 1.
%H Björg N. Cyvin, Jon Brunvoll and Sven J. Cyvin, <a href="https://doi.org/10.1007/BFb0018563">Enumeration of benzenoid systems and other polyhexes</a>, p. 65-180 in: I. Gutman (ed.), Advances in the Theory of Benzenoid Hydrocarbons II, Springer, 1992.
%Y Cf. A323931.
%K nonn,more
%O 1,5
%A _N. J. A. Sloane_, Feb 09 2019
%E a(13)-a(20) from Cyvin, Brunvoll & Cyvin (Table 14) added by _Andrey Zabolotskiy_, Feb 16 2023
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