A185428 Number of (n+2)X4 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

284037544, 21536560306, 1090205284029, 41910604337378, 1297535366114472, 33575010264022917, 745543958045415621, 14492443009379677098, 250496452202647761530, 3898612401674733619729, 55201391258522554476152

Offset: 1

Author

R. H. Hardin Jan 27 2011

Keywords

• nonn

Comments

Column 2 of A185435

Examples

			Some solutions for 6X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..1..5..7....0..0..6..6....0..1..5..5....0..0..6..7....0..1..4..6
..7..4..2..7....0..5..1..4....4..3..2..6....2..5..3..3....1..5..0..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200
• R. H. Hardin, Formula: polynomial of degree 126

Formula

Polynomial of degree 126, see link.