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A120448 Number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons. 0

%I

%S 0,3,17,14,92,60,316,175,814,495,2323,1402,6037,3113,12851,6200,24710,

%T 11851,46152,18123,72151,18007,74547,8970,40141

%N Number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons.

%C See Table 4 column 9 on page 615 of the paper by Caporossi and Hansen. Also the sequence starts for the hydrocarbon C_(54)H_(18).

%D G. Caporossi and P. Hansen, "Enumeration of Polyhex Hydrocarbons to h=21", J. Chem. Inf. Comput. Sci., vol. 38 (1998) pp. 610-619.

%e If the number of carbons is 56 then the number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons is 17 which is the third term in the sequence.

%Y Cf. A018190.

%K nonn

%O 54,2

%A _Parthasarathy Nambi_, Aug 27 2006

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Last modified December 7 17:17 EST 2021. Contains 349582 sequences. (Running on oeis4.)