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 A355948 #10 Jul 22 2022 16:43:59 %S A355948 8,56,176,344,632,840,1376,1736,2312,2840,3728,3968,5336,5960,6816, %T A355948 7880,9416,9912,11888,12344,14008,15656,17696,17872,20648,22232,23984, %U A355948 25304,28568,28376,32768,33800,36296,38840,40848,42008,47096,48872,51296,52568,58088,58136,64016,65144,67712,72392 %N A355948 Number of edges formed in a square by straight line segments when connecting the four corner vertices to the points dividing the sides into n equal parts. %C A355948 See A108914 for images of the squares. %F A355948 a(n) = A108914(n) + A355949(n) - 1 by Euler's formula. %Y A355948 Cf. A108914 (regions), A355949 (vertices), A355992 (k-gons), A355840, A331452, A335678. %K A355948 nonn %O A355948 1,1 %A A355948 _Scott R. Shannon_, Jul 21 2022