A186907 Number of (n+2)X3 0..6 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

2066505, 59969593, 1276581035, 22000126445, 319741716426, 4028133387613, 44902749582723, 449959668016830, 4103914508092780, 34409633745323847, 267409041699567853, 1939370255679423718, 13202565796526137619

Offset: 1

Author

R. H. Hardin Feb 28 2011

Keywords

• nonn

Comments

Column 1 of A186915

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..3..3....0..0..2....0..3..3....0..1..5....0..0..0....0..0..1....0..0..2
..0..3..4....0..1..1....0..4..5....0..6..5....0..2..5....0..3..3....0..5..2
..0..6..6....3..2..1....2..3..3....6..4..6....3..3..5....0..5..4....6..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200
• R. H. Hardin, Polynomial of degree 83

Formula

Polynomial of degree 83 in n, see link.