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 A267071 Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its west or southwest neighbor modulo n and the upper left element equal to 0. 0

%I

%S 1,0,6,1129,437427,310439601,368078731163,672850064250832,

%T 1794103196444632314

%N Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its west or southwest neighbor modulo n and the upper left element equal to 0.

%C Column 3 of A267072.

%e Some solutions for n=4

%e ..0..0..2....0..2..2....0..2..0....0..2..1....0..0..3....0..3..3....0..0..2

%e ..0..3..1....2..0..3....3..2..2....2..2..1....2..0..2....1..1..3....1..3..1

%e ..3..1..1....0..3..1....0..3..1....0..3..3....1..3..2....2..0..2....3..2..1

%e ..3..2..2....1..1..3....1..1..3....1..0..3....1..3..1....1..0..2....3..2..0

%Y Cf. A267072.

%K nonn

%O 1,3

%A _R. H. Hardin_, Jan 10 2016

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Last modified October 23 00:24 EDT 2020. Contains 337962 sequences. (Running on oeis4.)