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A000942 Number of free planar polyenoids with n nodes. 1
1, 1, 1, 3, 4, 12, 26, 77, 204, 624, 1817, 5585, 17007, 52803, 164001 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

REFERENCES

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

CROSSREFS

Sequence in context: A070765 A000577 A111758 * A197459 A000207 A002986

Adjacent sequences:  A000939 A000940 A000941 * A000943 A000944 A000945

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 12:05 EST 2012. Contains 205782 sequences.