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 A075139 #3 Mar 30 2012 17:22:26
%S A075139 1,9,61,1121,13045,122641,1016471,38740403,5676677,272781835,
%T A075139 3616405543,69929227909,2202505459051,149719228176481,151721190428485,
%U A075139 1075152085921603,44585730010290731,1306775686290234751
%N A075139 Numerator of the generalized harmonic number H(n,5,2).
%C A075139 The denominators are in A075140. See A075135 for more details.
%t A075139 a=5; b=2; maxN=20; s=0; Numerator[Table[s+=1/(a n + b), {n, 0, maxN-1}]]
%Y A075139 Cf. A075135, A075140.
%K A075139 easy,frac,nonn
%O A075139 1,2
%A A075139 _T. D. Noe_, Sep 04 2002