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A038146 Number of n-celled helicenes with peri-fragments. 1
0, 0, 0, 0, 0, 0, 3, 36, 342, 2736 (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..10.

CROSSREFS

Cf. A018190, A038143-A038147.

Sequence in context: A034860 A220831 A003691 * A067444 A092648 A026121

Adjacent sequences:  A038143 A038144 A038145 * A038147 A038148 A038149

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 22 02:44 EDT 2019. Contains 326169 sequences. (Running on oeis4.)