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 A064874 #3 Mar 30 2012 18:50:18 %S A064874 0,0,0,1,0,0,1,1,0,0,0,1,2,0,1,1,0,0,0,1,0,1,2,2,2,0,0,1,1,0,1,1,0,1, %T A064874 0,1,0,0,1,1,0,0,1,3,2,0,1,1,4,0,0,1,0,0,1,1,2,2,0,1,1,0,1,1,0,0,1,3, %U A064874 0,1,3,3,0,0,0,1,2,2,2,2,0,0,0,1,2,0,1,1,4,0,0,1,1,2,2,2,4,0,0,1,0,0,1,1,0 %N A064874 Second of four sequences representing the lexicographical minimal decomposition of n in 4 squares: n = A064873(n)^2 + a(n)^2 + A064875(n)^2 + A064876(n)^2. %e A064874 a(19) = 1: 19 = A064873(19)^2 + a(19)^2 + A064875(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 A064874 Cf. A064873, A064875, A064876, A064877. %K A064874 nonn %O A064874 0,13 %A A064874 _Reinhard Zumkeller_, Oct 10 2001