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 A270315 #13 Feb 16 2025 08:33:31
%S A270315 2,7,58,6256,37041488,3283456941510566,
%T A270315 87990824525320083189557345568930,
%U A270315 6787481189341615675664690311149906782682845820114751821172918190
%N A270315 Denominators of r-Egyptian fraction expansion for the Euler-Mascheroni constant (Gamma-Euler constant), where r = (1,1/2,1/3,1/4,...)
%C A270315 Suppose that r is a sequence of rational numbers r(k) <= 1 for k >= 1, and that x is an irrational number in (0,1). Let f(0) = x, n(k) = floor(r(k)/f(k-1)), and f(k) = f(k-1) - r(k)/n(k). Then x = r(1)/n(1) + r(2)/n(2) + r(3)/n(3) + ... , the r-Egyptian fraction for x.
%C A270315 See A269993 for a guide to related sequences.
%H A270315 Clark Kimberling, <a href="/A270315/b270315.txt">Table of n, a(n) for n = 1..11</a>
%H A270315 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/EgyptianFraction.html">Egyptian Fraction</a>
%H A270315 <a href="/index/Ed#Egypt">Index entries for sequences related to Egyptian fractions</a>
%e A270315 log(2) = 1/2 + 1/(2*7) + 1/(3*58) + ...
%t A270315 r[k_] := 1/k; f[x_, 0] = x; z = 10;
%t A270315 n[x_, k_] := n[x, k] = Ceiling[r[k]/f[x, k - 1]]
%t A270315 f[x_, k_] := f[x, k] = f[x, k - 1] - r[k]/n[x, k]
%t A270315 x = GammaEuler; Table[n[x, k], {k, 1, z}]
%Y A270315 Cf. A269993.
%K A270315 nonn,frac,easy
%O A270315 1,1
%A A270315 _Clark Kimberling_, Mar 15 2016