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 A157801 #7 Mar 16 2014 10:57:46 %S A157801 1,-5,11,-10,133,-10,131,-70,1333,782,-48545,-20350,61236703,722774, %T A157801 -5580043,-34607350,25950004661,2145998366,-2832495728863, %U A157801 -167317266670,101471818426463,16020403321958,-4469253897847277,-1848020950359910,11126033443529034103,252778977216699950 %N A157801 Numerator of Bernoulli(n, -1/3). %H A157801 Vincenzo Librandi, <a href="/A157801/b157801.txt">Table of n, a(n) for n = 0..250</a> %t A157801 Numerator[BernoulliB[Range[0,30],-(1/3)]] (* _Harvey P. Dale_, Nov 17 2012 *) %Y A157801 For denominators see A157800. %K A157801 sign,frac %O A157801 0,2 %A A157801 _N. J. A. Sloane_, Nov 08 2009