cp's OEIS Frontend

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.

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.

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%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