A183417 Number of nX4 0..2 arrays with each sum of a(1..i,1..j) no greater than i*j.

35, 1920, 118128, 7798591, 535504390, 37791169786, 2719090433234, 198527626261156, 14661270464301970, 1092691428398410348, 82050496246290924387, 6199895182931575557720, 470968211438917677149130

Offset: 1

Author

R. H. Hardin Jan 04 2011

Keywords

• nonn

Comments

Column 4 of A183419

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..2....0..0..2..1....0..0..1..2....0..0..2..2....0..1..0..1
..1..0..0..0....2..2..2..0....2..1..2..2....1..0..2..1....0..1..1..0
..1..0..0..0....1..2..1..1....2..2..1..1....2..2..2..0....1..2..0..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..28