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 A064875 #3 Mar 30 2012 18:50:18 %S A064875 0,0,1,1,0,1,1,1,2,0,1,1,2,2,2,2,0,1,3,3,2,2,3,3,2,0,1,1,1,2,2,2,4,4, %T A064875 3,3,0,1,1,1,2,4,4,3,2,3,3,3,4,0,1,1,4,2,2,2,4,2,3,3,3,5,5,5,0,1,1,3, %U A064875 2,2,5,5,6,3,5,5,6,3,5,5,4,0,1,1,4,2,2,2,6,5,3,3,3,5,3,3,4,4,7,7,0,1,1,1,2 %N A064875 Third of four sequences representing the lexicographical minimal decomposition of n in four squares: n = A064873(n)^2 + A064874(n)^2 + a(n)^2 + A064876(n)^2. %e A064875 a(19) = 3: 19 = A064873(19)^2 + A064874(19)^2 + a(19)^2 + A064876(19)^2 = 0 + 1 + 9 + 9 and the other decomposition (1, 1, 1, 4) is greater than (0, 1, 3, 3). %Y A064875 Cf. A064873, A064874, A064876, A064877. %K A064875 nonn %O A064875 0,9 %A A064875 _Reinhard Zumkeller_, Oct 10 2001