A000942 Number of free planar polyenoids with n nodes.
1, 1, 1, 3, 4, 12, 26, 77, 204, 624, 1817, 5585, 17007, 52803, 164001, 514009, 1615044, 5100324, 16152134, 51324864
Offset: 1
Links
- S. J. Cyvin, J. Brunvoll, E. Brendsdal, B. N. Cyvin and E. K. Lloyd, Enumeration of polyene hydrocarbons: a complete mathematical solution, J. Chem. Inf. Comput. Sci., 35 (1995) 743-751
- S. J. Cyvin, J. Brunvoll, E. Brendsdal, B. N. Cyvin and E. K. Lloyd, Enumeration of polyene hydrocarbons: a complete mathematical solution, J. Chem. Inf. Comput. Sci., 35 (1995) 743-751. [Annotated scanned copy]
Crossrefs
Cf. A197459 (where polyedges may have cycles).
Extensions
More terms from Sean A. Irvine, Oct 12 2015