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