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 A331254 #8 Jan 19 2020 20:40:47 %S A331254 1,1,2,2,1,2,3,3,1,2,2,3,4,3,1,2,4,3,2,3,4,5,3,1,4,4,2,3,5,4,2,5,3,6, %T A331254 5,4,1,3,2,4,5,3,4,6,5,2,6,4,5,1,6,2,3,3,5,7,3,4,4,4,6,5,5,7,6,2,7,4, %U A331254 6,1,5,5,2,6,3,3,7,6,4,8,5,4,7,3,5,6,8 %N A331254 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 shortest side i. The other sides are in A331255 and A331256. %e A331254 List of triangles begins: %e A331254 n %e A331254 | R^2 = A331227(n)/A331228(n) %e A331254 | | i .... (this sequence) %e A331254 | | | j .. (A331255) %e A331254 | | | | k (A331256) %e A331254 | | | | | %e A331254 1 1/ 3 1 1 1 %e A331254 2 16/15 1 2 2 %e A331254 3 4/ 3 2 2 2 %e A331254 4 16/ 7 2 2 3 %e A331254 5 81/35 1 3 3 %e A331254 6 81/32 2 3 3 %e A331254 7 3/ 1 3 3 3 %e A331254 8 81/20 3 3 4 %e A331254 9 256/63 1 4 4 %e A331254 10 64/15 2 3 4 %e A331254 11 64/15 2 4 4 %e A331254 12 256/55 3 4 4 %Y A331254 Cf. A331227, A331228, A331251, A331252, A331253. %Y A331254 Cf. A331255 (middle side), A331256 (longest side). %K A331254 nonn %O A331254 1,3 %A A331254 _Hugo Pfoertner_, Jan 19 2020