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A000942 Number of free planar polyenoids with n nodes. 2

%I

%S 1,1,1,3,4,12,26,77,204,624,1817,5585,17007,52803,164001,514009,

%T 1615044,5100324,16152134,51324864

%N Number of free planar polyenoids with n nodes.

%H S. J. Cyvin, J. Brunvoll, E. Brendsdal, B. N. Cyvin and E. K. Lloyd, <a href="https://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]

%Y Cf. A197459 (where polyedges may have cycles).

%K nonn,more

%O 1,4

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

%E More terms from _Sean A. Irvine_, Oct 12 2015

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Last modified September 22 06:01 EDT 2021. Contains 347605 sequences. (Running on oeis4.)