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 A066141 #16 Feb 03 2020 15:30:41
%S A066141 3,5,13,69,631,7783,117657,2097161,43046731,1000000011,25937424613,
%T A066141 743008370701,23298085122495,793714773254159,29192926025390641,
%U A066141 1152921504606846993,48661191875666868499,2185911559738696531987,104127350297911241532861
%N A066141 a(n) = n^(n-1) + n + 1.
%H A066141 Harry J. Smith, <a href="/A066141/b066141.txt">Table of n, a(n) for n = 1..100</a>
%t A066141 Table[n^(n-1)+n+1,{n,1,25}] (* _Vladimir Joseph Stephan Orlovsky_, Jan 30 2012 *)
%o A066141 (PARI) { for (n=1, 100, write("b066141.txt", n, " ", n^(n-1) + n + 1) ) } \\ _Harry J. Smith_, Feb 02 2010
%K A066141 easy,nonn
%O A066141 1,1
%A A066141 _George E. Antoniou_, Dec 07 2001