This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A358889 #19 Dec 06 2022 19:33:37 %S A358889 4,48,8,712,304,24,3368,2400,280,16,27424,20360,4784,504,32,56000, %T A358889 47088,10912,1400,88,8,292424,255608,69368,11504,960,56,658800,590208, %U A358889 175856,30160,2496,200,24,1748112,1593912,506496,93584,9616,520,24,2981448,2778456,890368,166912,17192,1144,48 %N A358889 Table read by rows: T(n,k) = number of k-gons, k >= 3, formed inside a square with edge length 1 by the straight line segments mutually connecting all vertices and points that divide the sides into segments with lengths equal to the Farey series of order n = A006842(n,m)/A006843(n,m), m = 1..A005728(n). %C A358889 The number of points along each edge is given by A005728(n). %H A358889 Scott R. Shannon, <a href="/A358889/a358889.jpg">Image for n = 5</a>. %H A358889 Wikipedia, <a href="https://en.wikipedia.org/wiki/Farey_sequence">Farey sequence</a>. %F A358889 Sum of row n = A358886(n). %e A358889 The table begins: %e A358889 4; %e A358889 48, 8; %e A358889 712, 304, 24; %e A358889 3368, 2400, 280, 16; %e A358889 27424, 20360, 4784, 504, 32; %e A358889 56000, 47088, 10912, 1400, 88, 8; %e A358889 292424, 255608, 69368, 11504, 960, 56; %e A358889 658800, 590208, 175856, 30160, 2496, 200, 24; %e A358889 1748112, 1593912, 506496, 93584, 9616, 520, 24; %e A358889 2981448, 2778456, 890368, 166912, 17192, 1144, 48; %e A358889 . %e A358889 . %Y A358889 Cf. A358886 (regions), A358887 (vertices), A358888 (edges), A006842, A006843, A005728, A358885. %Y A358889 The Farey Diagrams Farey(m,n) are studied in A358298-A358307 and A358882-A358885, the Completed Farey Diagrams of order (m,n) in A358886-A358889. %K A358889 nonn,more,tabl %O A358889 1,1 %A A358889 _Scott R. Shannon_ and _N. J. A. Sloane_, Dec 05 2022