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 A331228 #6 Jan 13 2020 15:19:35 %S A331228 3,15,3,7,35,32,1,20,63,15,15,55,3,4,99,96,39,91,231,11,84,3,224,143, %T A331228 7,7,35,5,64,8,39,119,455,1,51,255,195,320,192,96,96,187,180,95,171, %U A331228 55,160,3135,399,255,5,63,3,3,3,3,247,15,15,15,15,36,231,132,55 %N A331228 a(n) = denominator of squared radius R^2 of the circumcircle of the n-th triangle with integer sides i <= j <= k in a list of such triangles, the list being sorted by increasing size of R. Numerators are A331227. %C A331228 See A331222 and A331227. %e A331228 See A331227. %Y A331228 Cf. A331222, A331223, A331227. %K A331228 nonn,frac %O A331228 1,1 %A A331228 _Hugo Pfoertner_, Jan 12 2020