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A038143 Hexagonal cata-condensed helicenes with n cells (non-planar cata-fused benzenoid hydrocarbons). +0
6
0, 0, 0, 0, 0, 1, 5, 35, 200, 1121 (list; graph; listen)
OFFSET

1,7

REFERENCES

J. V. Knop et al., On the total number of polyhexes, Match, No. 16 (1984), 119-134.

CROSSREFS

Equals A002216-A038142. Cf. A018190.

Sequence in context: A166149 A002737 A123008 this_sequence A024062 A002074 A166176

Adjacent sequences: A038140 A038141 A038142 this_sequence A038144 A038145 A038146

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.


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