A332418 The number of vertices on a decagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

171, 3581, 23651, 80191, 213041, 444251, 862711, 1481141, 2413721, 3701951, 5493891, 7765621, 10833601, 14589491, 19315751, 25064491, 32107771, 40337021, 50328771, 61790891, 75318371

Offset

1,1

Comments

See the links in A333139 for images of the decagons.

Links

Table of n, a(n) for n=1..21.

Crossrefs

Cf. A333139 (regions), A332417 (n-gons), A332419 (edges), A330846, A092866, A332599, A007569.

Sequence in context: A195279 A370299 A016058 * A152926 A239270 A262142

Adjacent sequences: A332415 A332416 A332417 * A332419 A332420 A332421

Keyword

nonn,more

Author

Scott R. Shannon and N. J. A. Sloane, Mar 09 2020

Extensions

a(6)-a(21) from Lars Blomberg, May 18 2020

Status

approved