

A220038


Number of n X n arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X n array


0




OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

Some solutions for n=3
..0..0..0....1..1..1....1..0..0....2..0..0....0..0..0....2..2..2....2..0..0
..0..0..0....1..1..1....1..0..0....1..0..1....0..0..0....2..2..2....1..0..0
..0..3..0....3..2..2....2..0..3....1..1..1....3..0..2....2..2..2....1..0..1


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



