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 A158514 #5 Mar 16 2014 16:38:22
%S A158514 1,-1,-23,6,1919,-170,-14729,9194,5159039,-829746,-1270389115,
%T A158514 113574802,1230513089867,-22005182602,-4276962719801,5736562638330,
%U A158514 108296822232645343,-1936755687728738,-9194150224979606003,822132393822871778,12552825267118398962989
%N A158514 Numerator of Bernoulli(n, 3/7).
%H A158514 Vincenzo Librandi, <a href="/A158514/b158514.txt">Table of n, a(n) for n = 0..250</a>
%t A158514 Table[Numerator[BernoulliB[n, 3/7]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 16 2014 *)
%Y A158514 For denominators see A158475.
%K A158514 sign,frac
%O A158514 0,3
%A A158514 _N. J. A. Sloane_, Nov 08 2009