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 A245593 #11 Sep 08 2022 08:46:09
%S A245593 1,121,1367631,1523548331041,169342410709747836551,
%T A245593 1881665133128606900860142518161,
%U A245593 2090750117762021873788017450039922462386871,232305712669729896500117628007183171975956078054818623681,2581174768482624149493549155062886015819364354785066837288515125486819591,2867971987924469323820403313431021627485478704243749999500499658223600043001340850612575601
%N A245593 a(n) = (R_n)^n.
%C A245593 R_n is the repdigit 11...111 with n 1's.
%H A245593 Vincenzo Librandi, <a href="/A245593/b245593.txt">Table of n, a(n) for n = 1..30</a>
%e A245593 1^1 = 1.
%e A245593 11^2 = 121.
%e A245593 111^3 = 1367631.
%e A245593 etc..
%t A245593 Table[((10^n - 1)/9)^n, {n, 10}] (* _Vincenzo Librandi_, Jul 27 2014 *)
%o A245593 (PARI) a(N) = for(n=1,N,print1(((10^n-1)/9)^n,", ")) \\ vary the program's range for any N
%o A245593 (Magma) [((10^n-1)/9)^n: n in [1..10]]; // _Vincenzo Librandi_, Jul 27 2014
%Y A245593 Cf. A002275.
%K A245593 nonn,easy
%O A245593 1,2
%A A245593 _Derek Orr_, Jul 27 2014