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 A066298 #15 Feb 16 2025 08:32:45
%S A066298 0,0,1,0,0,4,4,0,1,0,1,4,3,4,10,0,4,10,9,0,4,12,13,16,0,16,10,4,16,10,
%T A066298 5,0,1,4,25,28,10,28,16,0,1,4,31,12,10,36,27,16,11,0,4,16,28,10,45,32,
%U A066298 28,16,16,40,47,36,46,0,55,34,10,4,13,60,20,64,72,10,25,28,67,16,67,0
%N A066298 a(n) = googol (mod n).
%C A066298 A googol is 10^100.
%H A066298 Alois P. Heinz, <a href="/A066298/b066298.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from Harry J. Smith)
%H A066298 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Googol.html">Googol</a>
%p A066298 a:= n-> 10&^100 mod n:
%p A066298 seq(a(n), n=1..100); # _Alois P. Heinz_, Feb 07 2018
%t A066298 Table[PowerMod[10, 100, n], {n, 2, 50}]
%o A066298 (PARI) { g=10^100; for (n=1, 1000, write("b066298.txt", n, " ", g%n) ) } \\ _Harry J. Smith_, Feb 09 2010
%o A066298 (PARI) a(n) = lift(Mod(10, n)^100); \\ _Michel Marcus_, Feb 07 2018
%Y A066298 Cf. A067007.
%K A066298 nonn
%O A066298 1,6
%A A066298 _Eric W. Weisstein_