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 A083062 #11 Apr 13 2022 18:59:13
%S A083062 0,1,2,13,104,1111,14706,233017,4304672,90909091,2161452050,
%T A083062 57154490053,1664148937320,52914318216943,1824557876586914,
%U A083062 67818912035696881,2703399548648159360,115047976828352449051,5206367514895562076642,249660952380952380952381
%N A083062 a(n) = (n+1)^n/(n+2) - (-1)^n/(n+2).
%H A083062 Vincenzo Librandi, <a href="/A083062/b083062.txt">Table of n, a(n) for n = 0..200</a>
%t A083062 Table[(n+1)^n/(n+2)-(-1)^n/(n+2),{n,0,20}] (* _Harvey P. Dale_, Oct 08 2013 *)
%Y A083062 Cf. A081216, A081209.
%K A083062 easy,nonn
%O A083062 0,3
%A A083062 _Paul Barry_, Apr 20 2003