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 A021102 #29 Jul 21 2025 14:25:10
%S A021102 0,1,0,2,0,4,0,8,1,6,3,2,6,5,3,0,6,1,2,2,4,4,8,9,7,9,5,9,1,8,3,6,7,3,
%T A021102 4,6,9,3,8,7,7,5,5,1,0,2,0,4,0,8,1,6,3,2,6,5,3,0,6,1,2,2,4,4,8,9,7,9,
%U A021102 5,9,1,8,3,6,7,3,4,6,9,3,8,7,7,5,5,1,0,2,0,4,0,8,1,6,3,2,6,5,3
%N A021102 Decimal expansion of 1/98.
%C A021102 Generalization:
%C A021102 1/8 = sum (2^i/10^(i+1)), i >= 0,
%C A021102 1/98 = sum (2^i/100^(i+1)), i >= 0, (this sequence)
%C A021102 1/998 = sum (2^i/1000^(i+1)), i >= 0,
%C A021102 1/9998 = sum (2^i/10000^(i+1)), i >= 0, ... - _Daniel Forgues_, Oct 28 2011
%H A021102 Mario Raso, <a href="https://hdl.handle.net/11573/1732819">Integer Sequences in Cryptography: A New Generalized Family and its Application</a>, Ph. D. Thesis, Sapienza University of Rome (Italy 2025). See p. 9.
%H A021102 <a href="/index/Rec#order_22">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,-1,1).
%t A021102 Join[{0},RealDigits[1/98,10,120][[1]]] (* _Harvey P. Dale_, May 29 2013 *)
%Y A021102 Cf. A020821 (1/8), A022002 (1/998), A236799 (1/9998).
%K A021102 nonn,cons
%O A021102 0,4
%A A021102 _N. J. A. Sloane_