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 A066644 #17 Jan 03 2016 17:48:09
%S A066644 12,50,113,201,314,452,615,804,1017,1256,1520,1809,2123,2463,2827,
%T A066644 3216,3631,4071,4536,5026,5541,6082,6647,7238,7853,8494,9160,9852,
%U A066644 10568,11309,12076,12867,13684,14526,15393,16286,17203,18145,19113,20106,21124,22167
%N A066644 a(n) = floor(surface area of a sphere with radius n).
%H A066644 Harry J. Smith, <a href="/A066644/b066644.txt">Table of n, a(n) for n = 1..1000</a>
%F A066644 a(n) = floor(4*Pi*n^2).
%p A066644 A066644:=n->floor(4*Pi*n^2): seq(A066644(n), n=1..100); # _Wesley Ivan Hurt_, Sep 15 2015
%t A066644 Table[ Floor[4Pi*n^2], {n, 50} ]
%o A066644 (PARI) { for (n=1, 1000, write("b066644.txt", n, " ", floor(4*Pi*n^2)) ) } \\ _Harry J. Smith_, Mar 16 2010
%K A066644 easy,nonn
%O A066644 1,1
%A A066644 _Amarnath Murthy_, Dec 29 2001
%E A066644 More terms from _Robert G. Wilson v_, Jan 03 2002