A332428 The number of vertices on a nonagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

135, 2395, 16434, 53155, 141147, 293374, 565767, 966493, 1580940, 2411533, 3581613, 5070655, 7057026, 9493435, 12594564, 16307974, 20902338, 26269597, 32760774, 40217905, 49049919, 59090671, 70803180

Offset

1,1

Comments

See the links in A332421 for images of the nonagons.

Links

Table of n, a(n) for n=1..23.

Crossrefs

Cf. A332421 (regions), A332427 (n-gons), A332429 (edges), A330846, A092866, A332599, A007569.

Sequence in context: A210102 A061073 A195671 * A212608 A212611 A004005

Adjacent sequences: A332425 A332426 A332427 * A332429 A332430 A332431

Keyword

nonn,more

Author

Scott R. Shannon and N. J. A. Sloane, Mar 09 2020

Extensions

a(6)-a(23) from Lars Blomberg, May 16 2020

Status

approved