A202742 T(n,k)=Number of nXk 0..1 arrays with row sums equal and column sums unequal to adjacent columns.

2, 2, 2, 2, 2, 2, 2, 6, 8, 2, 2, 22, 38, 10, 2, 2, 54, 140, 86, 32, 2, 2, 102, 638, 838, 282, 44, 2, 2, 214, 3032, 6870, 5092, 1074, 128, 2, 2, 582, 14258, 62398, 75302, 29680, 2802, 186, 2, 2, 1590, 70136, 613950, 1375912, 827502, 183220, 8694, 512, 2, 2, 3814

Offset: 1

Author

R. H. Hardin Dec 23 2011

Keywords

• nonn
• tabl

Comments

Table starts

.2...2.....2........2...........2............2.............2.............2

.2...2.....6.......22..........54..........102...........214...........582

.2...8....38......140.........638.........3032.........14258.........70136

.2..10....86......838........6870........62398........613950.......6018166

.2..32...282.....5092.......75302......1375912......24620522.....472929952

.2..44..1074....29680......827502.....27842760.....967878370...35772388788

.2.128..2802...183220.....8870150....578826040...37121438930.2639009446600

.2.186..8694..1061814....93402390..11600238174.1401569558590

.2.512.30170..6630116...969837470.239443637912

.2.772.82286.39048472.10133577294

Examples

			Some solutions for n=5 k=3
..1..0..1....1..1..0....0..1..0....1..0..0....0..0..1....1..0..1....1..0..0
..1..1..0....1..0..1....0..1..0....0..0..1....0..0..1....1..0..1....1..0..0
..1..1..0....1..1..0....1..0..0....1..0..0....0..0..1....1..1..0....0..1..0
..1..0..1....1..0..1....0..1..0....1..0..0....0..1..0....1..0..1....1..0..0
..1..1..0....1..0..1....0..1..0....0..0..1....0..0..1....0..1..1....0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..110