A000935 - OEIS

%I #19 Oct 16 2015 10:00:34

%S 0,1,2,7,20,63,191,598,1870,5906

%N Number of free planar polyenoids with 2n nodes and symmetry point group C_{2h}.

%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 1,3

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

%E a(8)-a(10) and improved title by _Sean A. Irvine_, Oct 15 2015