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Number of nX3 arrays containing 3 copies of 0..n-1 with every element equal to or 1 greater than any west neighbor modulo n and the upper left element equal to 0.
0

%I #4 Aug 12 2016 07:05:18

%S 1,10,39,208,1576,14830,168500,2247280,34423760,596248800,11529957600,

%T 246360114000

%N Number of nX3 arrays containing 3 copies of 0..n-1 with every element equal to or 1 greater than any west neighbor modulo n and the upper left element equal to 0.

%C Column 3 of A267629.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A267629.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 18 2016