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 A021985 #19 Jul 08 2025 09:12:35
%S A021985 0,0,1,0,1,9,3,6,7,9,9,1,8,4,5,0,5,6,0,6,5,2,3,9,5,5,1,4,7,8,0,8,3,5,
%T A021985 8,8,1,7,5,3,3,1,2,9,4,5,9,7,3,4,9,6,4,3,2,2,1,2,0,2,8,5,4,2,3,0,3,7,
%U A021985 7,1,6,6,1,5,6,9,8,2,6,7,0,7,4,4,1,3,8,6,3,4,0,4,6,8,9,0,9,2,7
%N A021985 Decimal expansion of 1/981.
%C A021985 Generalization:
%C A021985 1/81 = Sum_{i >= 0} 19^i/100^(i+1),
%C A021985 1/981 = Sum_{i >= 0} 19^i/1000^(i+1), (this sequence)
%C A021985 1/9981 = Sum_{i >= 0} 19^i/10000^(i+1). - _Daniel Forgues_, Oct 28 2011
%Y A021985 Cf. A021085 (1/81).
%K A021985 nonn,cons,easy
%O A021985 0,6
%A A021985 _N. J. A. Sloane_