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%I #5 Aug 11 2016 20:20:36
%S 1,400,1054200,12243840000,429355384500000,39489843246336000000,
%T 7875251932432856328000000,3103313606339070135803904000000,
%U 2222194400107579127937216888000000000
%N Number of n X 6 arrays of permutations of 6 copies of 0..n-1 with row sums equal.
%C Column 6 of A268367.
%e Some solutions for n=2
%e ..1..1..0..1..0..0....0..1..0..1..0..1....1..0..1..0..1..0....1..1..0..1..0..0
%e ..1..0..1..1..0..0....0..1..1..0..1..0....1..1..0..1..0..0....0..1..0..1..0..1
%Y Cf. A268367.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 03 2016