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A000941 Number of free planar polyenoids with n nodes and symmetry point group C_s. 2

%I

%S 0,0,0,0,2,5,21,58,194,570,1790,5434,16924,52362,163784,512670,

%T 1614406,5096314,16150180

%N Number of free planar polyenoids with n nodes and symmetry point group C_s.

%H S. J. Cyvin, J. Brunvoll, E. Brendsdal, B. N. Cyvin and E. K. Lloyd, <a href="http://dx.doi.org/10.1021/ci00026a012">Enumeration of polyene hydrocarbons: a complete mathematical solution</a>, J. Chem. Inf. Comput. Sci., 35 (1995) 743-751.

%H S. J. Cyvin, J. Brunvoll, E. Brendsdal, B. N. Cyvin and E. K. Lloyd, <a href="/A002057/a002057.pdf">Enumeration of polyene hydrocarbons: a complete mathematical solution</a>, J. Chem. Inf. Comput. Sci., 35 (1995) 743-751. [Annotated scanned copy]

%K nonn,more

%O 1,5

%A E. K. Lloyd (E.K.Lloyd(AT)soton.ac.uk)

%E Added a(16)-a(19) and title improved by _Sean A. Irvine_, Oct 13 2015

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Last modified July 28 18:31 EDT 2021. Contains 346335 sequences. (Running on oeis4.)