A316194 Number of symmetric self-avoiding polygons on square lattice with perimeter 2*n, not counting rotations and reflections as distinct.

0, 1, 1, 3, 4, 16, 23, 87

Offset: 1

Author

Hugo Pfoertner, Jun 27 2018

Keywords

• nonn
• walk
• more

Comments

The sequence includes polygons of 2-fold, i.e., mirror or rotational, and higher (order >= 4) symmetry.

Links

• Hugo Pfoertner, Illustration of polygons of perimeter <= 16.

Crossrefs

Cf. A002931, A266549, A316196, A323188, A323189.