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 A245805 #11 Sep 08 2022 08:46:09
%S A245805 0,1,23,397,6095,87781,1214423,16344637,1263934,443884970,10042515022,
%T A245805 172385029466,2639243694814,3425068947279,144668963799141,
%U A245805 2875277066339415,1085339440747772,196822992743261908,4383664026916317980,13684547128550195393,470010017784675076171
%N A245805 a(n) = 12^n mod 11^n.
%H A245805 Vincenzo Librandi, <a href="/A245805/b245805.txt">Table of n, a(n) for n = 0..970</a>
%t A245805 Table[PowerMod[12, n, 11^n], {n, 0, 30}]
%o A245805 (Magma) [12^n mod 11^n: n in [0..25]];
%o A245805 (PARI) vector(50, n, 12^(n-1)%11^(n-1)) \\ _Derek Orr_, Aug 04 2014
%Y A245805 Cf. k^n mod (k-1)^n: A002380 (k=3), A064629 (k=4), A138589 (k=5), A138649 (k=6), A139786 (k=7), A138973 (k=8), A139733 (k=9), A016189 (k=10), A016195 (k=11), this sequence (k=12),
%K A245805 nonn,easy
%O A245805 0,3
%A A245805 _Vincenzo Librandi_, Aug 04 2014