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A000947 Number of free nonplanar polyenoids with n nodes and symmetry point group C_{2v}. 1

%I

%S 1,2,4,10,15,44,56,177,212,706,792,2714,2961

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

%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]

%F a(n) = A000063(n + 2) - A000936(n). - _Sean A. Irvine_, Oct 15 2015

%K nonn,more

%O 7,2

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

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

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Last modified October 22 18:50 EDT 2019. Contains 328319 sequences. (Running on oeis4.)