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 A021020 #21 Apr 04 2025 01:15:34
%S A021020 0,6,2,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T A021020 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%U A021020 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N A021020 Decimal expansion of 1/16.
%H A021020 Srinivasa Ramanujan, <a href="https://www.imsc.res.in/~rao/ramanujan/CamUnivCpapers/question/q463.htm">Question 463</a>, Journal of the Indian Mathematical Society, Vol. 5 (1913), p. 120.
%H A021020 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1).
%F A021020 Equals Integral_{x>=0} x/sinh(2*Pi*x) dx. - _Jean-François Alcover_, Mar 20 2013
%F A021020 Equals Integral_{x>=0} cos(2*Pi*x)/(exp(2*Pi*sqrt(x))-1) dx (Ramanujan, 1913). - _Amiram Eldar_, Jan 01 2025
%e A021020 0.0625
%t A021020 RealDigits[1/16, 10, 100, -1][[1]] (* _Amiram Eldar_, Jan 01 2025 *)
%K A021020 nonn,cons,easy
%O A021020 0,2
%A A021020 _N. J. A. Sloane_