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 A327926 #216 Aug 17 2024 14:20:18 %S A327926 1,99,9801,970299,96059601,9509900499,941480149401,93206534790699, %T A327926 9227446944279201,913517247483640899,90438207500880449001, %U A327926 8953382542587164451099,886384871716129280658801,87752102299896798785221299,8687458127689783079736908601 %N A327926 a(n) = 99^n. %H A327926 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (99). %F A327926 a(n) = 99^n. %F A327926 From _Elmo R. Oliveira_, Aug 11 2024: (Start) %F A327926 G.f.: 1/(1-99*x). %F A327926 E.g.f.: exp(99*x). %F A327926 a(n) = 99*a(n-1) for n > 0. (End) %e A327926 a(4) = 96059601 = 100^4 - 4*100^3 + 6*100^2 - 4*100 + 1 = 100000000 - 4000000 + 60000 - 400 - 1: 100000000 -> 96000000 -> 96060000 -> 96059600 -> 96059601. %e A327926 a(8) = 99^8 = 9227446944279201. %Y A327926 Cf. A096884, A007318. %K A327926 nonn,easy,less %O A327926 0,2 %A A327926 _Eliora Ben-Gurion_, Nov 09 2019