A316192 Number of self-avoiding polygons with perimeter n and sides = 1 that have vertex angles from the set 0, +-Pi/6, +-*Pi/3, +-Pi/2, +-2*Pi/3, +-5*Pi/6, not counting rotations and reflections as distinct.

0, 0, 1, 3, 4, 22, 69, 418, 2210, 14024

Offset: 1

Author

Hugo Pfoertner, Jul 07 2018

Keywords

• nonn
• walk
• more

Comments

Holes are excluded, i.e., the boundary path may nowhere touch or intersect itself.

Links

• Contest Organizers, Al Zimmermann's Programming Contests - Snakes on a Plane, Fall 2006.
• Hugo Pfoertner, Illustration of polygons of perimeter <= 8.

Crossrefs

Cf. A258206, A266549, A284869, A306182, A316195, A316197, A316198, A316199, A316200, A316201.