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A268118
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.
0
1, 35, 114, 1256, 23522, 726627, 36708187, 3039274773
OFFSET
1,2
COMMENTS
Superdiagonal 2 of A268115.
EXAMPLE
Some solutions for n=5
..0..0..1..2..2..3..4....0..0..1..1..2..2..3....0..1..2..2..3..3..4
..1..1..2..2..3..4..0....1..1..2..2..3..3..4....1..2..3..3..4..4..0
..1..2..3..3..4..0..0....2..2..2..3..4..4..0....2..2..3..4..0..0..1
..2..3..3..4..4..0..1....3..3..3..4..0..0..0....2..3..4..4..0..1..1
..2..3..4..4..0..1..1....4..4..4..0..1..1..1....2..3..4..0..0..1..1
CROSSREFS
Cf. A268115.
Sequence in context: A156332 A110832 A251269 * A374809 A212888 A044286
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2016
STATUS
approved