A316197 Number of self-avoiding polygons with perimeter 2*n and sides = 1 that have vertex angles from the set +-Pi/7, +-3*Pi/7, +-5*Pi/7, not counting rotations and reflections as distinct.

0, 0, 3, 4, 83, 533, 8329

Offset: 1

Author

Hugo Pfoertner, Jun 28 2018

Keywords

• nonn
• walk
• more

Links

• Contest Organizers, Al Zimmermann's Programming Contests - Snakes on a Plane, Fall 2006.
• Hugo Pfoertner, Illustration of polygons of perimeter <= 12.

Crossrefs

Cf. A306177, A258206, A266549, A284869, A316195.