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 A066068 #35 Sep 08 2022 08:45:04
%S A066068 1,2,6,30,260,3130,46662,823550,16777224,387420498,10000000010,
%T A066068 285311670622,8916100448268,302875106592266,11112006825558030,
%U A066068 437893890380859390,18446744073709551632,827240261886336764194
%N A066068 a(n) = n^n + n.
%H A066068 Harry J. Smith, <a href="/A066068/b066068.txt">Table of n, a(n) for n=0..100</a>
%F A066068 E.g.f.: (1-x*e^x*T(x)+x*e^x)/(1-T(x)), where T(x) is Euler's tree function (see A000169). - _Len Smiley_, Dec 04 2001
%F A066068 Resultant of nx^n+1 and nx-1. - _Ralf Stephan_, Nov 20 2004
%F A066068 a(n) = n*A124923(n), n>0. - _R. J. Mathar_, Oct 31 2015
%F A066068 Sum_{n>=1} 1/a(n) = A286193. - _Amiram Eldar_, Nov 19 2020
%t A066068 Table[ n^n + n, {n, 1, 18} ]
%t A066068 Table[If[n==0,1,n^n+n],{n,0,18}] (* _Vladimir Joseph Stephan Orlovsky_, Apr 14 2011 *)
%o A066068 (PARI) a(n) = n^n + n; \\ _Harry J. Smith_, Nov 09 2009
%o A066068 (Magma) [ n^n+n: n in [0..100] ]; // _Vincenzo Librandi_, Apr 15 2011
%Y A066068 Cf. A000169, A000312, A124923, A286193.
%K A066068 nonn,easy
%O A066068 0,2
%A A066068 _George E. Antoniou_, Dec 02 2001