A333112 The number of edges inside a heptagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

91, 1575, 10962, 35812, 96257, 201054, 389991, 668458, 1096508, 1675835, 2494989, 3536876, 4930408, 6639913, 8816458, 11425631, 14659085, 18433975, 23007579, 28257418, 34478871, 41557817, 49822388, 59079475, 69756253, 81641812, 95165210

Offset

1,1

Comments

See the links in A329713 for images of the heptagons.

Links

Table of n, a(n) for n=1..27.

Crossrefs

Cf. A329713 (regions), A329714 (n-gons), A333113 (vertices), A330845, A274586 , A332600, A331765.

Sequence in context: A213559 A120756 A027787 * A140667 A221939 A254611

Adjacent sequences: A333109 A333110 A333111 * A333113 A333114 A333115

Keyword

nonn,more

Author

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

Extensions

a(8)-a(27) from Lars Blomberg, May 13 2020

Status

approved