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 A192494 #18 Aug 24 2021 21:09:51
%S A192494 2,1,4,18,16,1,2,9,8,4,98,50,18,1,16,4,98,50,2,64,242,36,18,1,64,16,9,
%T A192494 196,50,4,338,98,2,49,64,242,25,162,18,9,4,338,578,256,98,50,324,722,
%U A192494 242,16,1,18,8,100,2,98,98,49,242,25,722,1058,1,36,32,16,121,4,578,338,18,256,98,9,144,484,50,64,50,242,1
%N A192494 Denominators of squared radii of circumcircles of non-degenerate triangles with integer vertex coordinates.
%H A192494 Hugo Pfoertner, <a href="/A192494/b192494.txt">Table of n, a(n) for n = 1..9089</a>, covering range R^2 <= 100.
%e A192494 The smallest triangle of lattice points {(0,0),(1,0),(0,1)} has circumradius R=sqrt(2)/2, i.e., R^2=1/2. Therefore A192493(1)=1, a(1)=2.
%Y A192494 Cf. A192493 (corresponding numerators).
%Y A192494 Cf. A346993, A346994, A346995.
%K A192494 nonn,frac
%O A192494 1,1
%A A192494 _Hugo Pfoertner_, Jul 10 2011