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 A074598 #2 Mar 30 2012 17:30:49
%S A074598 4,24,236,3248,57556,416152,2136452,63349408,710302388,26725332056,
%T A074598 1112171931196,375714836272,2662087948804,142662781936712,
%U A074598 2738366988282628,168623511779891008,170109214167178588
%N A074598 Numerator of 4 * H(n,4,1), a generalized harmonic number. See A075136.
%t A074598 Table[ Numerator[ Sum[1/i, {i, 1/4, n}]], {n, 1, 20}]
%Y A074598 The denominators are in A051539.
%Y A074598 Cf. A075136.
%K A074598 easy,frac,nonn
%O A074598 1,1
%A A074598 _Robert G. Wilson v_, Aug 27 2002