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 A100668 #32 Feb 16 2025 08:32:55
%S A100668 8,3,2,7,4,6,1,7,7,2,7,6,8,6,7,1,5,0,6,4,6,4,1,7,5,1,9,4,0,8,1,1,5,5,
%T A100668 3,5,1,6,2,4,3,1,5,3,1,0,2,6,3,2,8,1,0,1,6,3,1,4,9,8,1,9,7,5,8,4,5,8,
%U A100668 1,3,5,1,4,4,6,0,9,5,8,4,2,2,9,0,2,0,2,6,0,0,3,4,4,4,3,0,6,3,0,4,6,7,8,6,0
%N A100668 Decimal expansion of the base-2 analog of the Euler-Mascheroni constant.
%H A100668 Alois P. Heinz, <a href="/A100668/b100668.txt">Table of n, a(n) for n = 0..10000</a>
%H A100668 Hartosh Singh Bal and Gaurav Bhatnagar, <a href="https://arxiv.org/abs/1903.09619">Prime number conjectures from the Shapiro class structure</a>, arXiv:1903.09619 [math.NT], 2019.
%H A100668 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Euler-MascheroniConstant.html">Euler-Mascheroni Constant</a>.
%H A100668 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HarmonicNumber.html">Harmonic Number</a> (with contribution from Jonathan Sondow).
%H A100668 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Lg.html">Lg</a>.
%F A100668 EulerGamma/log(2) = A001620/A002162.
%F A100668 Equals Integral_{x=-infinity..infinity} x*2^(-x)*log(2)*exp(-2^(-x)) dx. - _Alois P. Heinz_, Nov 09 2016
%e A100668 0.83274617727686715064641751940811553516243153102632810163149819758458\ 1351446095842290202600344430630467860292319092706478030883524064025...
%t A100668 RealDigits[Limit[Sum[D[Log[2, x], x] /. x -> k, {k, 1, n}] - Log[2, n], n -> Infinity], 10, 135][[1]]
%o A100668 (PARI) Euler/log(2) \\ _Michel Marcus_, Jun 02 2020
%Y A100668 Cf. A001620, A002162, A158468.
%K A100668 cons,nonn
%O A100668 0,1
%A A100668 Joseph Biberstine (jrbibers(AT)indiana.edu), Dec 05 2004