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 A084363 #17 Feb 26 2020 16:03:27
%S A084363 1,7,73,943,14601,264311,5484865,128452927,3352566673,96513215599,
%T A084363 3038428376721,103854777002351,3830383180320217,151630719172112935,
%U A084363 6412840260155078401,288579496823639935231,13767936546888372165153
%N A084363 a(n) = n^(n+1) - (n-1)^n.
%C A084363 n-th partial arithmetic mean is n^n.
%t A084363 Table[n^(n+1)-(n-1)^n, {n,25}] (* _Vladimir Joseph Stephan Orlovsky_, Dec 29 2010 *)
%o A084363 (PARI) for(n=1,17,print1(n^(n+1)-(n-1)^n,","))
%o A084363 (Maxima) A084363[n]:=n^(n+1)-(n-1)^n$
%o A084363 makelist(A084363[n],n,1,30); /* _Martin Ettl_, Oct 29 2012 */
%Y A084363 Cf. A000312, A007778.
%K A084363 easy,nonn
%O A084363 1,2
%A A084363 _Amarnath Murthy_, May 27 2003
%E A084363 Edited and extended by _Klaus Brockhaus_, May 30 2003