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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

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

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. [Annotated scanned copy]

CROSSREFS

Sequence in context: A000577 A111758 A264484 * A255436 A197459 A000207

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 16 19:17 EST 2019. Contains 329201 sequences. (Running on oeis4.)