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 A331256 #4 Jan 19 2020 20:41:00 %S A331256 1,2,2,3,3,3,3,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6, %T A331256 7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,7,8,8,7,8,7,8,8,8,8,8,8,8,8,8,9, %U A331256 9,9,9,9,9,9,9,9,9,9,9,8,9,9,9,8,9,9,9 %N A331256 Triangles with integer sides i <= j <= k sorted by radius of circumcircle, and, in case of ties, lexicographically by side lengths (smallest first). The sequence gives the longest side k. The other sides are in A331254 and A331255. %e A331256 See A331254. %Y A331256 Cf. A331227, A331228 (squared radius of circumcircle), A331254 (shortest side), A331255 (middle side). %K A331256 nonn %O A331256 1,2 %A A331256 _Hugo Pfoertner_, Jan 19 2020