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 A074637 #12 May 16 2022 04:58:23
%S A074637 4,40,524,976,20084,491192,13935164,450160544,93250876,1249813672,
%T A074637 55206526972,2657681947952,46167204272716,235410309457592,
%U A074637 14140794103168588,14376406243883968,978062783205294796
%N A074637 Numerator of 4 * H(n,4,3), a generalized harmonic number.
%F A074637 a(n) = numerator(4 * Sum_{j=0..n-1} 1/(4*j + 3)) = numerator(Psi(n + 3/4) - Psi(3/4)), with the Digamma function Psi(z). See a comment in A074638 with the Abramowitz-Stegun link. - _Wolfdieter Lang_, Apr 05 2022
%t A074637 Table[ Numerator[ Sum[1/i, {i, 3/4, n}]], {n, 1, 20}]
%Y A074637 The denominators are in A074638.
%Y A074637 Cf. A075135.
%K A074637 easy,frac,nonn
%O A074637 1,1
%A A074637 _Robert G. Wilson v_, Aug 27 2002
%E A074637 Better description from _T. D. Noe_, Sep 04 2002