A219909 - OEIS

A219909

Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array

%I #5 Dec 18 2015 18:18:22

%S 3,3,24,234,3800,105936,6705546,1037180598

%N Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array

%C Diagonal of A219915

%e Some solutions for n=3

%e ..0..0..0....1..0..0....1..0..0....0..0..0....1..0..0....1..0..0....1..1..1

%e ..0..0..0....1..0..0....1..0..0....0..0..0....1..0..0....0..0..0....1..1..1

%e ..0..0..0....1..1..1....2..1..1....2..1..1....2..0..0....0..0..0....2..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 01 2012