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 A021260 #22 Apr 28 2024 11:53:04
%S A021260 0,0,3,9,0,6,2,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T A021260 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 A021260 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 A021260 Decimal expansion of 1/256.
%H A021260 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1).
%F A021260 Equals Integral{x >= 0} (x^5/sinh(2*Pi*x)) dx. - _Jean-François Alcover_, Mar 20 2013
%e A021260 1/256 = 0.00390625.
%t A021260 Join[{0, 0}, RealDigits[1/256, 10][[1]]] (* _Alonso del Arte_, Apr 16 2018 *)
%o A021260 (PARI) 1/256. \\ _Altug Alkan_, Apr 16 2018
%K A021260 nonn,cons,easy
%O A021260 0,3
%A A021260 _N. J. A. Sloane_