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

1,1

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

Table of n, a(n) for n=1..14.

Lars Blomberg, Examples of canonical polygons containing only right angles

Crossrefs

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

Sequence in context: A372023 A046277 A053571 * A129883 A376965 A293578

Adjacent sequences: A307388 A307389 A307390 * A307392 A307393 A307394

Keyword

nonn,more

Author

Lars Blomberg, Apr 18 2019

Status

approved