A038140 Number of planar polyhexes with n cells and a single hole of size at least 2.
0, 0, 0, 0, 0, 0, 0, 1, 5, 43, 283, 1954, 12363, 76283, 453946, 2641506
Offset: 1
Links
- Sven J. Cyvin, Jon Brunvoll, Björg N. Cyvin, John L. Bergan, and E. Brendsdal, The simplest coronoids: hollow hexagons, Struct. Chem., 2 (1991), 555-566.
- J. V. Knop, W. R. Mueller, K. Szymanski, and N. Trinajstic, Use of small computers for large computations: enumeration of polyhex hydrocarbons, J. Chem. Inf. Comput. Sci., 30 (1990), 159-160.
Extensions
Name clarified by Andrey Zabolotskiy, Feb 17 2023