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 A083069 #7 Jun 21 2013 11:36:52
%S A083069 1,2,11,94,1037,14006,224695,4185098,88888889,2122152922,56288512931,
%T A083069 1642813694534,52332842192581,1807181134905134,67253754435399407,
%U A083069 2683521610790452306,114296029267382825201,5175920921241202064498
%N A083069 Main diagonal of number array A083064.
%H A083069 Vincenzo Librandi, <a href="/A083069/b083069.txt">Table of n, a(n) for n = 0..100</a>
%F A083069 a(n) = (n*(n+2)^n+1)/(n+1).
%t A083069 Table[(n (n + 2)^n + 1) / (n + 1), {n, 0, 20}] (* _Vincenzo Librandi_, Jun 21 2013 *)
%Y A083069 Cf. A083070, A083071.
%K A083069 easy,nonn
%O A083069 0,2
%A A083069 _Paul Barry_, Apr 21 2003