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 A138202 #7 Mar 27 2013 07:51:18 %S A138202 1,36,144,64,36,576,576,0,144,900,576,576,64,576,2304,0,36,2304,1296, %T A138202 576,576,2304,576,0,576,900,5184,1024,0,5184,2304,0,144,2304,2304, %U A138202 2304,900,576,5184,0,576,9216,2304,576,576,5184,2304,0,64,2916,7056,2304,576,5184 %N A138202 a(n) = A005875(n)^2. %H A138202 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> %t A138202 SquaresR[3,#]^2 &/@Range[0,53] (* _Ant King_, Mar 27 2013 *) %K A138202 nonn %O A138202 0,2 %A A138202 _N. J. A. Sloane_, Mar 04 2010