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Number of nX(n+2) arrays of permutations of n+2 copies of 0..n-1 with every element equal to or 1 greater than any north, west or northwest neighbors modulo n and the upper left element equal to 0.
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%I #3 Jan 13 2016 20:30:09

%S 1,35,18,38,71,132,222,368,568,866,1254,1799,2483

%N Number of nX(n+2) arrays of permutations of n+2 copies of 0..n-1 with every element equal to or 1 greater than any north, west or northwest neighbors modulo n and the upper left element equal to 0.

%C Superdiagonal 2 of A267401.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A267401.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 13 2016