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 A158701 #6 Mar 17 2014 04:13:43
%S A158701 1,-7,131,-231,14287,-2695,153941,-79079,8006287,4028409,-1844246495,
%T A158701 -809434087,16807591453717,203438983033,-10883405258173,
%U A158701 -69286922606055,359945895253332479,30552782191862777,-279390115069297124593,-16939504536585585383
%N A158701 Numerator of Bernoulli(n, -3/8).
%H A158701 Vincenzo Librandi, <a href="/A158701/b158701.txt">Table of n, a(n) for n = 0..250</a>
%t A158701 Table[Numerator[BernoulliB[n, -3/8]], {n, 0, 50}] (* _Vincenzo Librandi_, Mar 17 2014 *)
%Y A158701 For denominators see A158654.
%K A158701 sign,frac
%O A158701 0,2
%A A158701 _N. J. A. Sloane_, Nov 08 2009