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A219571
Number of n X n arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X n array
0
4, 13, 415, 18564, 2399643, 1391739384
OFFSET
1,1
COMMENTS
Diagonal of A219578
EXAMPLE
Some solutions for n=3
..1..1..0....0..0..0....3..0..0....2..0..0....1..1..0....1..1..1....0..0..0
..3..0..0....0..0..0....3..2..0....2..2..0....2..0..0....1..1..0....2..0..0
..3..0..0....1..1..1....3..3..2....2..1..1....2..0..0....2..0..0....2..2..0
CROSSREFS
Sequence in context: A219707 A219822 A048558 * A304545 A316372 A306130
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 23 2012
STATUS
approved