A329710 The number of edges inside a pentagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

20, 290, 2215, 7405, 21150, 43490, 88230, 151135, 250825, 384360, 578840, 814180, 1151525, 1550530, 2063225, 2676925, 3452460, 4333340, 5436210, 6668320, 8154980, 9837690, 11822175, 13993360, 16569650, 19401865, 22636495, 26182350, 30253225, 34608450, 39628050

Offset

1,1

Comments

See the links in A331929 for images of the pentagons.

Links

Lars Blomberg, Table of n, a(n) for n = 1..35

Crossrefs

Cf. A331929 (regions), A331939 (n-gons), A330847 (vertices), A330845, A274586, A332600, A331765.

Sequence in context: A021164 A225829 A017918 * A125477 A016261 A016309

Adjacent sequences: A329707 A329708 A329709 * A329711 A329712 A329713

Keyword

nonn

Author

Scott R. Shannon and N. J. A. Sloane, Mar 07 2020

Extensions

a(9) and beyond from Lars Blomberg, May 11 2020

Status

approved