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 A158994 #6 Mar 19 2014 09:57:49
%S A158994 1,5,300,250,30000,25000,21000000,2500000,300000000,250000000,
%T A158994 330000000000,25000000000,273000000000000,2500000000000,
%U A158994 300000000000000,250000000000000,510000000000000000,25000000000000000
%N A158994 Denominator of Bernoulli(n, 1/10).
%H A158994 Vincenzo Librandi, <a href="/A158994/b158994.txt">Table of n, a(n) for n = 0..250</a>
%t A158994 Table[Denominator[BernoulliB[n, 1/10]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 19 2014 *)
%Y A158994 For numerators see A158992.
%K A158994 nonn,frac
%O A158994 0,2
%A A158994 _N. J. A. Sloane_, Nov 08 2009