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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. 4
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 (list; graph; refs; listen; history; text; internal format)
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,changed

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

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Last modified May 25 02:01 EDT 2020. Contains 334581 sequences. (Running on oeis4.)