A185429 Number of (n+2)X5 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

8653394212, 1090205284029, 84722449466168, 4772160687307074, 209290512833668811, 7468756070356586903, 223694029250999654095, 5755145891541173071730, 129520045203909930078682

Offset: 1

Author

R. H. Hardin Jan 27 2011

Keywords

• nonn

Comments

Column 3 of A185435

Examples

			Some solutions for 4X5
..0..0..0..0..2....0..0..0..0..0....0..0..0..0..0....0..0..0..0..2
..0..0..0..0..5....0..0..0..0..0....0..0..0..0..6....0..0..0..0..4
..0..0..0..6..4....0..0..0..2..4....0..0..0..4..3....0..0..0..1..4
..0..0..4..2..5....0..0..0..3..7....0..0..4..5..2....0..0..4..2..5
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200
• R. H. Hardin, Formula: polynomial of degree 133

Formula

Polynomial of degree 133, see link