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A206883
T(n,k)=Number of nXk 0..1 arrays avoiding 0 1 0 horizontally and 1 0 1 vertically
7
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
1,1
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
LINKS
EXAMPLE
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
CROSSREFS
Column 1 is A005251(n+3)
Column 2 is A188501
Sequence in context: A188695 A188508 A207000 * A206889 A188774 A206936
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Feb 13 2012
STATUS
approved