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%I #5 Aug 11 2016 20:20:17
%S 1,36,2700,643680,190188000,128247235200,114921318153600,
%T 164433011758848000,312067875406065408000,867549791919350615040000,
%U 2986581009309337422259200000
%N Number of n X 4 arrays of permutations of 4 copies of 0..n-1 with row sums equal.
%C Column 4 of A268367.
%e Some solutions for n=3
%e ..0..0..2..2....0..2..2..0....1..2..0..1....0..2..0..2....1..1..2..0
%e ..1..1..0..2....0..1..2..1....2..0..2..0....1..1..2..0....0..2..1..1
%e ..2..1..0..1....1..0..1..2....1..2..0..1....1..0..1..2....0..2..0..2
%Y Cf. A268367.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 03 2016
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