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 A034948 #19 Feb 11 2025 10:07:31
%S A034948 0,0,0,1,0,2,0,3,0,4,0,5,0,6,0,7,0,8,0,9,1,0,1,1,1,2,1,3,1,4,1,5,1,6,
%T A034948 1,7,1,8,1,9,2,0,2,1,2,2,2,3,2,4,2,5,2,6,2,7,2,8,2,9,3,0,3,1,3,2,3,3,
%U A034948 3,4,3,5,3,6,3,7,3,8,3,9,4,0,4,1,4,2,4,3,4,4,4,5,4,6,4,7,4,8,4
%N A034948 Decimal expansion of 1/9801.
%C A034948 Group the terms 2 by 2 to get (except 98): 00, 01, 02, 03, ..., 97, 99, then repeat. - _Michel Marcus_, Mar 17 2013
%C A034948 Periodic with period 198; a(n) = a(n-198) for n > 200. - _Charles R Greathouse IV_, Feb 11 2025
%H A034948 G. C. Greubel, <a href="/A034948/b034948.txt">Table of n, a(n) for n = 0..5000</a>
%H A034948 StackExchange, <a href="http://math.stackexchange.com/questions/102682/what-is-special-about-the-numbers-9801-998001-99980001">What is special about the numbers 9801, 998001, 99980001 ..?</a>
%H A034948 <a href="/index/Rec#order_198">Index entries for linear recurrences with constant coefficients</a>, order 198.
%F A034948 Equals 1/9801 = 1/99^2.
%t A034948 Join[{0,0,0}, RealDigits[1/(9801), 10, 50][[1]]] (* _G. C. Greube_, Nov 05 2017 *)
%o A034948 (PARI) \p 200
%o A034948 1/9801.0 \\ _Michel Marcus_, Mar 17 2013
%Y A034948 Cf. A036663, A036664, A036665.
%K A034948 nonn,cons,easy
%O A034948 0,6
%A A034948 _Marvin Ray Burns_