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%I #4 Aug 12 2016 07:05:18
%S 1,0,1,322,52149,33089774,32230426133,53280974043650
%N Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, northeast or northwest neighbor modulo n and the upper left element equal to 0.
%C Column 3 of A266886.
%e Some solutions for n=5
%e ..0..0..0....0..0..4....0..4..0....0..0..4....0..2..1....0..0..0....0..4..0
%e ..2..3..2....3..2..3....2..3..2....2..3..3....4..4..1....2..3..3....3..3..2
%e ..1..1..2....1..2..1....1..1..2....1..2..1....4..3..1....2..2..1....0..2..2
%e ..4..4..4....0..4..1....4..1..0....4..4..0....2..3..3....4..4..1....4..4..1
%e ..3..1..3....2..4..3....4..3..3....1..3..2....0..2..0....1..4..3....1..3..1
%Y Cf. A266886.
%K nonn
%O 1,4
%A _R. H. Hardin_, Jan 05 2016
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