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The number of edges on a nonagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.
5

%I #16 May 16 2020 08:57:20

%S 288,5148,33291,108252,283464,591723,1133928,1941786,3166605,4837824,

%T 7170120,10164258,14124447,19017180,25206777,32659191,41826366,

%U 52595622,65549880,80507142,98143200,118271898,141655707

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

%C See the links in A332421 for images of the nonagons.

%Y Cf. A332421 (regions), A332427 (n-gons), A332428 (vertices), A330845, A274586, A332600, A331765.

%K nonn,more

%O 1,1

%A _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 09 2020

%E a(6)-a(23) from _Lars Blomberg_, May 16 2020