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%I #4 Aug 12 2016 07:05:18
%S 1,0,1,255,55971,27018228,26810032261,44283186874351
%N Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, west or southeast neighbor modulo n and the upper left element equal to 0.
%C Column 3 of A267546.
%e Some solutions for n=4
%e ..0..2..2....0..3..2....0..2..0....0..3..2....0..2..1....0..2..0....0..2..2
%e ..3..1..0....3..1..1....2..1..3....3..2..0....0..2..0....2..0..2....2..1..0
%e ..1..3..2....2..1..3....0..3..2....1..0..2....3..1..3....1..3..1....1..3..3
%e ..0..3..1....0..0..2....3..1..1....1..3..1....1..3..2....3..3..1....0..3..1
%Y Cf. A267546.
%K nonn
%O 1,4
%A _R. H. Hardin_, Jan 16 2016
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