login
A220287
T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and vertical neighbors in a random 0..1 nXk array
5
1, 2, 2, 4, 4, 4, 8, 31, 31, 8, 16, 96, 139, 96, 16, 32, 424, 1411, 1411, 424, 32, 64, 1422, 9430, 15382, 9430, 1422, 64, 128, 5504, 63154, 232795, 232795, 63154, 5504, 128, 256, 19606, 452515, 3061937, 5691450, 3061937, 452515, 19606, 256, 512, 73294, 3130768
OFFSET
1,2
COMMENTS
Table starts
...1.....2.......4........8........16........32.......64.......128......256
...2.....4......31.......96.......424......1422.....5504.....19606....73294
...4....31.....139.....1411......9430.....63154...452515...3130768.21630714
...8....96....1411....15382....232795...3061937.40463019.533004621
..16...424....9430...232795...5691450.147661377
..32..1422...63154..3061937.147661377
..64..5504..452515.40463019
.128.19606.3130768
.256.73294
.512
LINKS
EXAMPLE
Some solutions for n=3 k=4
..0..1..0..1....0..1..1..0....0..1..0..1....0..0..0..0....1..0..0..0
..1..1..0..0....1..0..0..1....1..0..1..0....0..0..0..0....0..0..0..1
..1..1..1..1....1..1..0..1....0..0..1..0....1..0..0..1....1..0..0..1
CROSSREFS
Sequence in context: A316883 A317611 A220461 * A354492 A320195 A129163
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Dec 09 2012
STATUS
approved