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 A172165 #14 Sep 08 2022 08:45:50
%S A172165 2,4,12,68,630,7782,117656,2097160,43046730,1000000010,25937424612,
%T A172165 743008370700,23298085122494,793714773254158,29192926025390640,
%U A172165 1152921504606846992,48661191875666868498,2185911559738696531986,104127350297911241532860
%N A172165 A simple sequence a(n) = n + n^(n-1).
%H A172165 Vincenzo Librandi, <a href="/A172165/b172165.txt">Table of n, a(n) for n = 1..150</a>
%F A172165 a(n) = n + n^(n-1).
%F A172165 a(n) = n + A000169(n). - _R. J. Mathar_, Jan 30 2010
%e A172165 a(10) = 1000000010 = 10 + 10^9.
%t A172165 Table[n + n^(n - 1), {n, 25}] (* _Vladimir Joseph Stephan Orlovsky_, Jun 16 2011 *)
%o A172165 (Magma) [n + n^(n-1): n in [1..20]]; // _Vincenzo Librandi_, Jun 17 2011
%K A172165 easy,nonn
%O A172165 1,1
%A A172165 _Lorenzo Cococcia_, Jan 27 2010
%E A172165 Every second term removed by _R. J. Mathar_, Jan 30 2010