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A316196 Number of symmetric self-avoiding polygons on hexagonal lattice with perimeter n, not counting rotations and reflections as distinct. 4
0, 0, 1, 1, 1, 4, 3, 10, 9, 36, 27, 129, 90, 449, 331 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..15.

Hugo Pfoertner, Illustration of polygons of perimeter <= 11.

CROSSREFS

Cf. A036418, A284869, A306176.

Sequence in context: A213768 A075563 A299325 * A081617 A103252 A065763

Adjacent sequences:  A316193 A316194 A316195 * A316197 A316198 A316199

KEYWORD

nonn,walk,more

AUTHOR

Hugo Pfoertner, Jun 27 2018

STATUS

approved

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Last modified April 26 04:55 EDT 2019. Contains 322469 sequences. (Running on oeis4.)