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%I #11 Feb 16 2023 15:15:48
%S 0,0,1,1,4,3,12,10,34,28,97,81,271,226,764,638,2141,1787,6025,5030,
%T 16924,14116,47623,39727,133934,111655,377003,314297,1061064,884199
%N Unbranched catafusenes, mirror-symmetrical.
%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 The main sequences listed in Table 1 of Balaban et al. (1988) are A323931, A323932, A003104, A323851, A038142.
%K nonn,more
%O 1,5
%A _N. J. A. Sloane_, Feb 09 2019
%E a(13)-a(30) from Cyvin, Brunvoll & Cyvin (Tables 14 & 15) added by _Andrey Zabolotskiy_, Feb 16 2023
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