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 A340613 #23 Jan 17 2021 11:29:42 %S A340613 3,42,264,957,2763,5946,11976,20808,35121,53853,81822,116658,164409, %T A340613 222072,297654,386613,499305,629124,789156,970404,1189923,1435689, %U A340613 1726980,2050254,2428101,2843862,3323646,3847863,4446861,5096730,5833128,6627840,7520769,8480367,9550638,10695942,11966043 %N A340613 The number of edges on a Reuleaux triangle formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. %C A340613 The terms are from numeric computation - no formula for a(n) is currently known. %C A340613 See A340639 for images of the regions and A340644 for images of the vertices. %H A340613 Wikipedia, <a href="https://en.wikipedia.org/wiki/Reuleaux_triangle">Reuleaux triangle</a>. %Y A340613 Cf. A340639 (regions), A340644 (vertices), A340614 (n-gons), A007678, A092867. %K A340613 nonn %O A340613 1,1 %A A340613 _Scott R. Shannon_ and _N. J. A. Sloane_, Jan 14 2021