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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 (list; table; graph; refs; listen; history; text; internal format)
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

R. H. Hardin, Table of n, a(n) for n = 1..112

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

Adjacent sequences:  A207012 A207013 A207014 * A207016 A207017 A207018

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 14 2012

STATUS

approved

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Last modified September 22 22:24 EDT 2020. Contains 337291 sequences. (Running on oeis4.)