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 A164940 #8 Feb 20 2015 11:46:14
%S A164940 1,37,181,245,281,857,1433,1433,1577,2477,3053,3629,3693,4269,6573,
%T A164940 6573,6609,8913,10209,10785,11361,13665,14241,14241,14817,15717,20901,
%U A164940 21925,21925,27109,29413,29413,29557,31861,34165,36469,37369,37945,43129,43129
%N A164940 Partial sums of A138202.
%H A164940 S. K. K. Choi, A. V. Kumchev and R. Osburn, <a href="http://arXiv.org/abs/math.NT/0502007">On sums of three squares</a>
%F A164940 For asymptotics see Choi et al.
%F A164940 In particular, lim_{n -> infinity} a(n)/n^2 = 8*Pi^4 / (21*zeta(3)). - _Ant King_, Mar 15 2013
%t A164940 Prepend[SquaresR[3,#]^2 &/@Range[39],1]//Accumulate (* _Ant King_, Mar 15 2013 *)
%K A164940 nonn
%O A164940 0,2
%A A164940 _N. J. A. Sloane_, Mar 04 2010