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 A239355 #15 Dec 21 2022 04:35:09 %S A239355 0,1,1,5,5,11,11,15,14,19,19,31,31,43,39,43,43,49,49,65,59,77,77,89, %T A239355 85,93,89,105,105,129,117,129,128,133,133,157,145,175,171,187,181,199, %U A239355 195,223,211,235,223,235,235,247,235,263,257,299,287,315,303,315 %N A239355 Number of unit hypercubes, aligned with a four-dimensional Cartesian mesh, partially enclosed along the edge of the first 2^4-ant of a hypersphere centered at the origin, ordered by increasing radius. %H A239355 Rajan Murthy, <a href="/A239355/b239355.txt">Table of n, a(n) for n = 1..201</a> %e A239355 At radius 0, there are no partially filled cubes. At radius > 0 but < 1, there is 1 partially filled square along the edge of the sphere. At radius = 1, there is 1 partially filled cube along the edge of the sphere. At radius > 1 but < sqrt(2), there are 5 partially filled cubes. %Y A239355 Cf. A001477 (corresponds to the square radius of alternate entries). %Y A239355 Cf. A237708 (3-dimensional analog), A234300 (2-dimensional analog). %K A239355 nonn %O A239355 1,4 %A A239355 _Rajan Murthy_, Mar 16 2014 %E A239355 Terms a(22) and beyond from b-file by _Andrew Howroyd_, Feb 05 2018