A206883 T(n,k)=Number of nXk 0..1 arrays avoiding 0 1 0 horizontally and 1 0 1 vertically.

2, 4, 4, 7, 16, 7, 12, 49, 49, 12, 21, 144, 230, 144, 21, 37, 441, 1011, 1011, 441, 37, 65, 1369, 4705, 6478, 4705, 1369, 65, 114, 4225, 22412, 44879, 44879, 22412, 4225, 114, 200, 12996, 105936, 321393, 472412, 321393, 105936, 12996, 200, 351, 40000, 497727

Offset: 1

Author

R. H. Hardin Feb 13 2012

Keywords

• nonn
• tabl

Comments

Table starts

...2.....4......7.......12........21..........37...........65............114

...4....16.....49......144.......441........1369.........4225..........12996

...7....49....230.....1011......4705.......22412.......105936.........497727

..12...144...1011.....6478.....44879......321393......2276625.......15986104

..21...441...4705....44879....472412.....5179587.....56006452......599130203

..37..1369..22412...321393...5179587....87541530...1455584860....23905464739

..65..4225.105936..2276625..56006452..1455584860..37121455086...933389392995

.114.12996.497727.15986104.599130203.23905464739.933389392995.35861331864570

Examples

			Some solutions for n=4 k=3
..0..0..1....0..1..1....1..0..0....0..0..1....1..0..1....0..1..1....1..1..1
..0..0..0....1..1..0....0..0..0....0..1..1....0..1..1....0..0..1....1..0..1
..1..1..0....0..0..0....0..1..1....0..1..1....0..0..1....0..0..1....0..0..1
..0..1..1....0..0..1....1..1..0....0..1..1....1..0..0....0..0..1....0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..364

Crossrefs

Column 1 is A005251(n+3)

Column 2 is A188501