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 A069547 #21 Jan 14 2024 12:38:00
%S A069547 1,1,4,2,3,10,15,7,12,13,28,33,5,24,37,44,53,19,26,45,3,10,31,42,43,
%T A069547 70,8,35,78,109,72,107,130,44,33,88,113,140,18,43,70,135,130,6,55,126,
%U A069547 99,74,131,210,38,75,158,155,198,243,21,112,157,228,42,35,285,53,156,235
%N A069547 a(n) = n^2 mod n-th prime.
%C A069547 What is the origin of pattern at n~(6-7)*10^3 (see link to figure)? - _Zak Seidov_, Nov 22 2011
%H A069547 Zak Seidov, <a href="/A069547/b069547.txt">Table of n, a(n) for n = 1..10000</a>
%H A069547 Zak Seidov, <a href="/A069547/a069547.png">Figure of dependence a(n) for n=1..10000</a>
%t A069547 Table[ PowerMod[n, 2, Prime[n]], {n, 1, 70}]
%o A069547 (PARI) vector(100, n, n^2 % prime(n)) \\ _Michel Marcus_, Jun 01 2015
%Y A069547 Cf. A000040, A004648.
%K A069547 nonn
%O A069547 1,3
%A A069547 _Reinhard Zumkeller_, Apr 17 2002
%E A069547 Edited and extended by _Robert G. Wilson v_, Apr 22 2002