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 A359655 #6 Jan 10 2023 18:22:47 %S A359655 4,12,172,1320,14588,33312,197416,469040,1305112,2274592,7172784, %T A359655 10407700,27421412 %N A359655 Number of edges formed in a square with edge length 1 by straight line segments when connecting the internal edge points that divide the sides into segments with lengths equal to the Farey series of order n to the equivalent points on the opposite side of the square. %C A359655 The number of points internal to each edge is given by A005728(n) - 2. %C A359655 See A359653 and A359654 for images of the square. %F A359655 a(n) = A359653(n) + A359654(n) - 1 by Euler's formula. %Y A359655 Cf. A359653 (regions) A359654 (vertices), A359656 (k-gons), A005728, A358888, A358884, A355800, A358950, A006842, A006843. %K A359655 nonn,more %O A359655 1,1 %A A359655 _Scott R. Shannon_ and _N. J. A. Sloane_, Jan 10 2023