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 A175370 #2 Mar 30 2012 17:40:19 %S A175370 1,9,81,137,321,609,1081,1561,2137,3193,4393,4889,6617,8425,9529, %T A175370 11905,14169,17097,18953,21953,25105,29177,32681,35937,41105,46321, %U A175370 50529,55217,62177,67665,74849,80817,87185,96449,104945,112609,120881,130137 %N A175370 a(n) = A175369(n^2). %C A175370 Number of integer 4-tuples (x,y,z,u) satisfying |x|^3+|y|^3+|z|^3+|u|^3 <= n^2, -n <= x,y,z <= n. If the cubes were replaced by squares, A055410 would result. %K A175370 nonn %O A175370 0,2 %A A175370 _R. J. Mathar_, Apr 24 2010