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a(n) = denominator of squared radius R^2 of the circumcircle of the n-th non-obtuse triangle with integer sides i <= j <= k <= sqrt(i^2 + j^2) in a list of such triangles, the list being sorted by increasing size of R. Numerators are A331222.
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%I #10 Jan 13 2020 15:20:01

%S 3,15,3,35,32,1,20,63,15,55,3,4,99,96,39,91,84,3,143,7,35,5,64,8,119,

%T 1,51,255,195,192,96,187,180,95,171,160,3135,255,5,63,3,3,247,15,15,

%U 231,132,55,207,1760,323,11,320,35,115,8855,308,3,299,20

%N a(n) = denominator of squared radius R^2 of the circumcircle of the n-th non-obtuse triangle with integer sides i <= j <= k <= sqrt(i^2 + j^2) in a list of such triangles, the list being sorted by increasing size of R. Numerators are A331222.

%C See A331222.

%e See A331222.

%Y Cf. A331222, A331227, A331228.

%K nonn,frac

%O 1,1

%A _Hugo Pfoertner_, Jan 12 2020