A330845 The number of edges inside a hexagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

42, 708, 4020, 15120, 38544, 83136, 169686, 294678, 475500, 746340, 1140624, 1581612, 2296986, 3055734, 3980526, 5391264, 7003662, 8516346, 11094810, 13280970, 16180932, 19971282, 24277212, 28090218, 33683862, 39656604, 45901494, 53121744, 62678268, 69382632

Offset: 1

Author

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

Keywords

• nonn

Comments

See the links in A331931 for images of the hexagons.

Crossrefs

Cf. A331931 (regions), A331932 (n-gons), A330846 (vertices), A274586 , A332600, A331765.

Extensions

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