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.

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

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