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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 or west neighbors modulo n and the upper left element equal to 0.
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%I #3 Jan 26 2016 17:19:16

%S 1,35,114,1256,23522,726627,36708187,3039274773

%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 or west neighbors modulo n and the upper left element equal to 0.

%C Superdiagonal 2 of A268115.

%e Some solutions for n=5

%e ..0..0..1..2..2..3..4....0..0..1..1..2..2..3....0..1..2..2..3..3..4

%e ..1..1..2..2..3..4..0....1..1..2..2..3..3..4....1..2..3..3..4..4..0

%e ..1..2..3..3..4..0..0....2..2..2..3..4..4..0....2..2..3..4..0..0..1

%e ..2..3..3..4..4..0..1....3..3..3..4..0..0..0....2..3..4..4..0..1..1

%e ..2..3..4..4..0..1..1....4..4..4..0..1..1..1....2..3..4..0..0..1..1

%Y Cf. A268115.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 26 2016