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 A021088 #12 Jul 08 2025 08:00:59
%S A021088 0,1,1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1,9,
%T A021088 0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,
%U A021088 1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1,9,0,4,7,6,1
%N A021088 Decimal expansion of 1/84.
%C A021088 Equals -10 + Sum_{i>=0} 10/29^(2*i). [_Bruno Berselli_, Oct 02 2015]
%H A021088 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 1).
%t A021088 Join[{0},RealDigits[1/84,10,120][[1]]] (* or *) PadRight[{0,1},120,{7,6,1,9,0,4}] (* _Harvey P. Dale_, May 21 2015 *)
%K A021088 nonn,cons
%O A021088 0,4
%A A021088 _N. J. A. Sloane_