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 A331255 #5 Jan 19 2020 20:40:53 %S A331255 1,2,2,2,3,3,3,3,4,3,4,4,4,4,5,5,4,5,4,3,5,5,5,6,4,5,6,6,5,6,5,6,4,6, %T A331255 5,6,7,6,7,5,6,7,7,6,7,6,7,7,6,8,6,8,5,7,7,7,8,4,6,8,7,5,8,7,8,7,8,8, %U A331255 7,9,7,8,9,6,8,9,7,8,9,8,9,7,8,6,6,9,8 %N A331255 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 middle side j. The other sides are in A331254 and A331256. %e A331255 See A331254. %Y A331255 Cf. A331227, A331228 (squared radius of circumcircle), A331254 (shortest side), A331256 (longest side). %K A331255 nonn %O A331255 1,2 %A A331255 _Hugo Pfoertner_, Jan 19 2020