A183415 Number of nX2 0..2 arrays with each sum of a(1..i,1..j) no greater than i*j.

5, 34, 249, 1920, 15232, 123323, 1012996, 8413325, 70482133, 594587235, 5044756083, 43007895169, 368151018388, 3162466934006, 27248906449457, 235414313839524, 2038652180610193, 17691623325368274, 153819626587560407

Offset: 1

Author

R. H. Hardin Jan 04 2011

Keywords

• nonn

Comments

Column 2 of A183419

Examples

			Some solutions for 4X2
..0..0....1..0....1..0....0..0....1..0....0..0....1..0....0..2....0..1....0..0
..2..2....1..0....0..2....1..2....0..1....0..0....0..2....2..0....0..0....2..2
..1..0....1..2....0..2....0..1....1..0....0..2....1..2....0..1....2..0....0..1
..1..0....0..2....2..0....2..2....1..2....2..0....0..2....0..0....0..0....0..1
		

Links

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