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A330846 The number of vertices inside a hexagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. 9
19, 301, 1753, 6913, 17713, 38497, 80473, 139927, 225595, 356329, 549967, 756901, 1113283, 1474867, 1913365, 2620789, 3418081, 4119175, 5428993, 6453235, 7861957, 9761335, 11913115, 13695055, 16489633, 19439797, 22464883, 25997329, 30860593, 33866305 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See the links in A331931 for images of the hexagons.

LINKS

Table of n, a(n) for n=1..30.

CROSSREFS

Cf. A331931 (regions), A331932 (n-gons), A330845 (edges), A092866, A332599, A007569.

Sequence in context: A199245 A152591 A051562 * A324359 A074460 A267010

Adjacent sequences:  A330843 A330844 A330845 * A330847 A330848 A330849

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

a(9)-a(30) from Lars Blomberg, May 12 2020

STATUS

approved

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Last modified September 24 15:40 EDT 2021. Contains 347643 sequences. (Running on oeis4.)