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 A067099 #8 Dec 20 2015 08:45:56
%S A067099 0,0,0,1,1,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,3,3,4,4,4,4,4,4,5,5,5,5,5,
%T A067099 5,6,6,6,6,6,6,7,7,7,7,7,7,7,8,8,8,8,8,8,9,9,9,9,9,9,10,10,10,10,10,
%U A067099 10,10,11,11,11,11,11,11
%N A067099 Floor[radius of the circumscribed circle of a regular n-gon with unit sides].
%H A067099 Harry J. Smith, <a href="/A067099/b067099.txt">Table of n, a(n) for n = 3..1000</a>
%F A067099 a(n) = floor(1/(2*sin(Pi/n))).
%e A067099 a(15) = floor(1/(2*sin(Pi/15))) = floor(2.40486717237206534804886845877139) = 2.
%t A067099 Table[ Floor[ 1/(2*Sin[Pi/n])], {n, 3, 75} ]
%o A067099 (PARI) { for (n=3, 1000, write("b067099.txt", n, " ", floor(1/(2*sin(Pi/n)))) ) } \\ _Harry J. Smith_, May 16 2010
%Y A067099 Cf. A067100.
%K A067099 easy,nonn
%O A067099 3,11
%A A067099 _Amarnath Murthy_, Jan 07 2002
%E A067099 More terms from _Robert G. Wilson v_, Jan 09 2002