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 A021222 #14 Jul 08 2025 08:10:54
%S A021222 0,0,4,5,8,7,1,5,5,9,6,3,3,0,2,7,5,2,2,9,3,5,7,7,9,8,1,6,5,1,3,7,6,1,
%T A021222 4,6,7,8,8,9,9,0,8,2,5,6,8,8,0,7,3,3,9,4,4,9,5,4,1,2,8,4,4,0,3,6,6,9,
%U A021222 7,2,4,7,7,0,6,4,2,2,0,1,8,3,4,8,6,2,3,8,5,3,2,1,1,0,0,9,1,7,4
%N A021222 Decimal expansion of 1/218.
%H A021222 <a href="/index/Rec#order_55">Index entries for linear recurrences with constant coefficients</a>, signature (1, 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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1).
%t A021222 Join[{0,0},RealDigits[1/218,10,120][[1]]] (* _Harvey P. Dale_, Feb 28 2013 *)
%Y A021222 Cf. A021113, A021440, A021876.
%K A021222 nonn,cons
%O A021222 0,3
%A A021222 _N. J. A. Sloane_