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A316193 Number of symmetric self-avoiding polygons on honeycomb net with perimeter 2*n, not counting rotations and reflections as distinct. 1
0, 0, 1, 0, 1, 1, 3, 1, 10, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

COMMENTS

The sequence includes polygons of 2-fold, i.e., mirror or rotational, and higher (order >= 3) symmetry.

LINKS

Table of n, a(n) for n=1..10.

Hugo Pfoertner, Illustration of polygons of perimeter <= 20.

CROSSREFS

Cf. A258206, A316194, A316196.

Sequence in context: A319375 A107870 A078817 * A091042 A111418 A113187

Adjacent sequences:  A316190 A316191 A316192 * A316194 A316195 A316196

KEYWORD

nonn,walk,more

AUTHOR

Hugo Pfoertner, Jul 03 2018

STATUS

approved

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Last modified January 19 17:45 EST 2019. Contains 319309 sequences. (Running on oeis4.)