A316193 Number of symmetric self-avoiding polygons on honeycomb net with perimeter 2*n, not counting rotations and reflections as distinct.

0, 0, 1, 0, 1, 1, 3, 1, 10, 5

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