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A038143 Hexagonal cata-condensed helicenes with n cells (non-planar cata-fused benzenoid hydrocarbons). 5
0, 0, 0, 0, 0, 1, 5, 35, 200, 1121, 5919 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

REFERENCES

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

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

Equals A002216-A038142. Cf. A018190.

Sequence in context: A241779 A265976 A123008 * A221578 A320071 A024062

Adjacent sequences:  A038140 A038141 A038142 * A038144 A038145 A038146

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 23 01:06 EDT 2019. Contains 326211 sequences. (Running on oeis4.)