A307387 a(n) is the number of canonical polygons with 4n alternating straight and diagonal edges.

1, 9, 191, 8049, 418184, 24283599

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Lars Blomberg, Examples of canonical polygons with alternating straight and diagonal edges

Crossrefs

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

Sequence in context: A218422 A119291 A113269 * A332119 A261826 A184688

Adjacent sequences: A307384 A307385 A307386 * A307388 A307389 A307390

Keyword

nonn,more

Author

Lars Blomberg, Apr 18 2019

Status

approved