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 A281997 #9 Feb 05 2017 21:12:07
%S A281997 0,4,216,20736,3200000,729000000,230539333248,96717311574016,
%T A281997 51998697814228992,34867844010000000000,28531167061100000000000,
%U A281997 27982542656501458535448576,32405578483833249047003529216,43752153272681450786889799450624
%N A281997 a(n) = (n-1)^n * n^n.
%F A281997 a(n) ~ A174881(n) / e^2.
%F A281997 a(n) = A007778(n-1)*A000312(n). - _Felix Fröhlich_, Feb 05 2017
%t A281997 Table[(n (n - 1))^n, {n, 14}] (* _Michael De Vlieger_, Feb 05 2017 *)
%o A281997 (PARI) a(n) = (n*(n-1))^n;
%Y A281997 Cf. A000312, A007778, A174881.
%K A281997 easy,nonn
%O A281997 1,2
%A A281997 _Daniel Suteu_, Feb 04 2017