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A000936 Number of free planar polyenoids with n nodes and symmetry point group C_{2v}. 2
0, 0, 1, 1, 2, 4, 4, 12, 10, 29, 27, 88, 76, 247, 217, 722, 638, 2134, 1901, 6413 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

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: A225232 A319210 A292303 * A319594 A065449 A130618

Adjacent sequences:  A000933 A000934 A000935 * A000937 A000938 A000939

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(16)-a(20) and title improved by Sean A. Irvine, Oct 14 2015

STATUS

approved

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Last modified February 21 15:34 EST 2019. Contains 320374 sequences. (Running on oeis4.)