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 A239353 #19 Dec 21 2022 04:35:16
%S A239353 1,5,11,15,19,31,32,44,48,54,58,70,82,94,100,112,124,148,164,176,194,
%T A239353 206,219,235,247,275,281,317,333,345,369,393,417,421,437
%N A239353 Number of unit hypercubes, aligned with a four-dimensional Cartesian mesh, completely within the first 2^4-ant of a hypersphere centered at the origin, ordered by increasing radius.
%H A239353 Rajan Murthy, <a href="/A239353/b239353.txt">Table of n, a(n) for n = 1..100</a>
%H A239353 Rajan Murthy, <a href="/A239353/a239353.txt">Scilab code for generating the sequence</a>
%e A239353 When the radius of the sphere reaches 2, one cube is completely within the sphere. When the radius reaches 7^(1/2), five cubes are completely within the sphere.
%Y A239353 Cf. A237707 (3-dimensional analog), A232499 (2-dimensional analog). The square radii corresponding to the elements of {a(n)} are the indices of the nonzero terms of A025428.
%K A239353 nonn
%O A239353 1,2
%A A239353 _Rajan Murthy_, Mar 16 2014