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 A066442 #12 Dec 07 2024 13:40:46
%S A066442 0,0,0,0,2,0,5,0,0,4,1,0,12,4,3,0,12,0,12,16,6,12,12,0,7,14,0,16,12,
%T A066442 24,12,0,12,8,3,0,12,30,12,16,12,36,12,12,27,6,12,0,19,24,45,40,12,0,
%U A066442 23,32,18,28,12,36,12,20,27,0,12,12,12,64,3,44,12,0,12,70,18,64,45,66,12
%N A066442 a(n) = 12^n mod n.
%H A066442 Harry J. Smith, <a href="/A066442/b066442.txt">Table of n, a(n) for n = 1..1000</a>
%t A066442 Table[PowerMod[12, n, n], {n, 80} ]
%o A066442 (PARI) a(n) = { lift(Mod(12, n)^n) } \\ _Harry J. Smith_, Feb 14 2010
%K A066442 nonn
%O A066442 1,5
%A A066442 _Robert G. Wilson v_, Dec 27 2001