A219932 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X n array

4, 23, 368, 21512, 3773045, 2574187888

Offset

1,1

Comments

Diagonal of A219939

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A327367 A303652 A130890 * A266919 A219464 A107765

Adjacent sequences: A219929 A219930 A219931 * A219933 A219934 A219935

Keyword

nonn

Author

R. H. Hardin Dec 01 2012

Status

approved