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 A331225 #5 Jan 14 2020 22:18:14 %S A331225 3,15,3,15,11,15,39,3,7,96,3,119,7,39,96 %N A331225 Denominator of squared radius of circumscribed circle of a triangle with integer sides i <= j <= k, such that the number of triangles with this radius sets a new record. Numerators are A331224. %e A331225 See A331224. %Y A331225 Cf. A331040, A331041, A331224, A331226, A331227, A331228. %K A331225 nonn,frac,more %O A331225 1,1 %A A331225 _Hugo Pfoertner_, Jan 14 2020