A307391 a(n) is the number of canonical polygons with 4n edges containing only right angles.

2, 0, 2, 2, 8, 14, 62, 196, 892, 3788, 18098, 86302, 427340, 2136248

Offset: 1

Author

Lars Blomberg, Apr 18 2019

Keywords

• nonn
• more

Comments

It appears that for the same sequence of angles there is one solution with all straight edges and one with all diagonal edges, so all terms are even.

Links

• Lars Blomberg, Examples of canonical polygons containing only right angles

Crossrefs

Cf. A052436, A307387, A307391, A307426, A307454, A307455, A307456, A307519.