A332419 The number of edges on a decagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

390, 7800, 48870, 164470, 430840, 900890, 1735800, 2982660, 4849740, 7438490, 11017860, 15596420, 21713060, 29254830, 38714410, 50238450, 64311090, 80839300, 100786890, 123786030, 150835530

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), A332418 (vertices), A330845, A274586, A332600, A331765.

Sequence in context: A206653 A202429 A236612 * A207575 A318174 A158004

Adjacent sequences: A332416 A332417 A332418 * A332420 A332421 A332422

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