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 A051490 #9 Jan 09 2015 09:16:30
%S A051490 0,3,256,30375,5308416,1313046875,440301256704,193010051319183,
%T A051490 107374182400000000,73994897046174912819,61917364224000000000000,
%U A051490 61870237399093306018139447,72790360926157879387298463744,99617732553594016079725341796875
%N A051490 a(n) = n^(n+2)*(n+2)^n.
%t A051490 Table[(n-1)^(n+1)*(n+1)^(n-1),{n,30}] (* _Vladimir Joseph Stephan Orlovsky_, Nov 20 2009 *)
%K A051490 nonn
%O A051490 0,2
%A A051490 _N. J. A. Sloane_