A185427 Number of (n+2)X3 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

6842284, 284037544, 8653394212, 212298419684, 4370405405266, 77657199293322, 1216284173329482, 17062128865116751, 217083576402029968, 2530473438240068012, 27249849558442300355, 272981324157512302120

Offset: 1

Author

R. H. Hardin Jan 27 2011

Keywords

• nonn

Comments

Column 1 of A185435

Examples

			Some solutions for 4X3
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..6....0..0..4....0..0..4....0..0..4....0..0..2....0..0..2....0..0..4
..0..4..4....2..7..3....2..6..1....2..4..4....0..4..2....0..7..2....2..5..6
..1..4..6....4..5..3....5..4..2....4..7..7....5..5..7....7..1..3....5..4..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200
• R. H. Hardin, Formula: polynomial of degree 119

Formula

Polynomial of degree 119, see link