Abstract
The numbers of nonisomorphic hollow hexagons are expressed in terms of a generating function.
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Cyvin, B.N., Brunvoll, J. & Cyvin, S.J. Enumeration of conjugated hydrocarbons: Hollow hexagons revisited. Struct Chem 6, 85–88 (1995). https://doi.org/10.1007/BF02281733
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DOI: https://doi.org/10.1007/BF02281733