A185468 Number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

1169, 21834, 308692, 3959167, 46410729, 493061605, 4845252741, 45945546278, 443977171724, 4605035061272, 52677880798334, 659609567593921, 8802320668197926, 122014363451316512, 1727721369461575287

Offset: 1

Author

R. H. Hardin Jan 28 2011

Keywords

• nonn

Comments

Diagonal of A185477

Examples

			Some solutions for 4X4
..0..0..0..2....0..0..0..0....0..0..2..2....0..0..0..2....0..0..1..1
..0..0..1..2....1..1..1..2....0..0..2..2....0..1..2..2....0..1..1..1
..0..1..1..2....1..1..2..0....0..0..2..2....0..2..1..1....0..1..1..2
..1..2..2..0....1..1..2..1....1..1..1..2....0..2..1..1....2..2..2..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..26