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 A135973 #22 Oct 10 2013 14:58:44
%S A135973 0,5,34,114,269,524,905,1437,2145,3054,4189,5576,7239,9203,11495,
%T A135973 14138,17158,20580,24430,28731,33511,38793,44603,50966,57906,65450,
%U A135973 73623,82448,91953,102161,113098,124789,137259,150533,164637,179595,195433
%N A135973 Ceiling(4/3*Pi*n^3).
%C A135973 Volume of a sphere of radius n, rounded up.
%H A135973 Vincenzo Librandi, <a href="/A135973/b135973.txt">Table of n, a(n) for n = 0..1000</a>
%F A135973 a(n) = A066645(n) + 1 for n > 0.
%t A135973 Table[Ceiling[4/3*Pi * n^3], {n, 0, 60}] (* _Vincenzo Librandi_, Feb 19 2013 *)
%o A135973 (Sage)
%o A135973 n=100 # change n for more values
%o A135973 [ceil(4/3*pi*r^3) for r in [0..n]] # _Tom Edgar_, Oct 10 2013
%o A135973 (PARI) a(n)=ceil(4/3*Pi*n^3) \\ _Charles R Greathouse IV_, Oct 10 2013
%Y A135973 Cf. A066643, A066644, A066645, A135039.
%K A135973 nonn,easy
%O A135973 0,2
%A A135973 _Mohammad K. Azarian_, Mar 02 2008
%E A135973 Definition replaced by _Vincenzo Librandi_, Feb 19 2013
%E A135973 0 prepended by _T. D. Noe_, Oct 10 2013