A316201 Number of self-avoiding polygons with perimeter 2*n and sides = 1 that have vertex angles from the set +-Pi/11, +-3*Pi/11, +-5*Pi/11, +-7*Pi/11, +-9*Pi/11, not counting rotations and reflections as distinct.

0, 0, 8, 19, 720, 10578

Offset: 1

Author

Hugo Pfoertner, Jul 07 2018

Keywords

• nonn
• 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 <= 10.

Crossrefs

Cf. A258206, A266549, A284869, A306181, A316192, A316195, A316197, A316198, A316199, A316200.