login
A207015
T(n,k)=Number of nXk 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column
9
3, 9, 9, 23, 81, 23, 61, 529, 529, 61, 161, 3721, 7891, 3721, 161, 425, 25921, 130165, 130165, 25921, 425, 1121, 180625, 2113177, 5174065, 2113177, 180625, 1121, 2957, 1256641, 34303001, 201211481, 201211481, 34303001, 1256641, 2957, 7801, 8743849
OFFSET
1,1
COMMENTS
Table starts
....3.......9.........23.............61...............161..................425
....9......81........529...........3721.............25921...............180625
...23.....529.......7891.........130165...........2113177.............34303001
...61....3721.....130165........5174065.........201211481...........7825530345
..161...25921....2113177......201211481.......18649387825........1728683700481
..425..180625...34303001.....7825530345.....1728683700481......381916401448593
.1121.1256641..555815721...303753655993...159875651653873....84153991018875649
.2957.8743849.9009608765.11797040231217.14795926235823289.18557751920452764329
LINKS
EXAMPLE
Some solutions for n=4 k=3
..2..0..1....1..2..2....2..0..2....2..0..1....1..2..2....1..0..2....2..1..0
..2..0..2....0..0..1....1..1..1....2..0..2....1..1..1....2..0..2....0..1..1
..2..0..2....2..2..0....1..1..0....1..0..2....1..0..0....0..2..2....1..0..2
..2..0..1....1..2..2....1..2..2....1..2..2....2..2..2....2..0..2....1..2..2
CROSSREFS
Sequence in context: A226852 A207235 A207228 * A268809 A268628 A269052
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Feb 14 2012
STATUS
approved