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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. 5
390, 7800, 48870, 164470, 430840, 900890, 1735800, 2982660, 4849740, 7438490, 11017860, 15596420, 21713060, 29254830, 38714410, 50238450, 64311090, 80839300, 100786890, 123786030, 150835530 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 6 13:45 EST 2021. Contains 349563 sequences. (Running on oeis4.)