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A000942
Number of free planar polyenoids with n nodes.
2
1, 1, 1, 3, 4, 12, 26, 77, 204, 624, 1817, 5585, 17007, 52803, 164001, 514009, 1615044, 5100324, 16152134, 51324864
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
Table of n, a(n) for n=1..20.
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).
Sequence in context: A111758 A264484 A343163 * A255436 A197459 A330659
Adjacent sequences: A000939 A000940 A000941 * A000943 A000944 A000945
KEYWORD
nonn,more
AUTHOR
E. K. Lloyd (E.K.Lloyd(AT)soton.ac.uk)
EXTENSIONS
More terms from Sean A. Irvine, Oct 12 2015
STATUS
approved

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Last modified November 14 23:23 EST 2024. Contains 377733 sequences.
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