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 A331258 #5 Jan 26 2020 17:47:59
%S A331258 12,20,3,28,28,2,4,12,5,36,5,44,3,44,44,1,52,44,3,52,7,12,52,7,52,7,4,
%T A331258 4,52,7,20,1,68,1,60,4,2,68,20,4,68,3,76,60,4,68,9,76,5,12,68,9,68,3,
%U A331258 76,5,68,3,76,1,4,11,68,9,76,5,84,11,92,3,76,76,1
%N A331258 Denominator of squared radius of inscribed circle of the n-th triangle with integer sides in the list given by A316841. Numerators are A331257.
%e A331258 See A331257.
%o A331258 (PARI) rh2(a,b,c)={my(s=(a+b+c)/2); (s-a)*(s-b)*(s-c)/s};
%o A331258 for(i=1,8, for(j=1,i, for(k=1,j, if(j+k>i, print1(denominator(rh2(i,j,k)),", ")))))
%Y A331258 Cf. A316841, A316843, A316844, A316845, A331257.
%K A331258 nonn,frac
%O A331258 1,1
%A A331258 _Hugo Pfoertner_, Jan 26 2020