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A202889 T(n,k)=Number of nXk 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor. 9
1, 3, 3, 9, 35, 9, 22, 265, 265, 22, 51, 1849, 5493, 1849, 51, 121, 13345, 109119, 109119, 13345, 121, 292, 96941, 2223723, 6092872, 2223723, 96941, 292, 704, 701275, 45332961, 348151747, 348151747, 45332961, 701275, 704, 1691, 5071167, 922352267 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
Table starts
...1.......3...........9.............22.................51
...3......35.........265...........1849..............13345
...9.....265........5493.........109119............2223723
..22....1849......109119........6092872..........348151747
..51...13345.....2223723......348151747........56006562037
.121...96941....45332961....19914296913......9024909392725
.292..701275...922352267..1137589582096...1452080571954205
.704.5071167.18770352883.64992189188797.233641209300452607
Some solutions for n=3 k=3
..1..2..2....1..1..2....2..1..1....2..2..1....2..2..0....1..2..2....2..1..0
..0..0..2....2..2..2....2..0..1....1..2..1....0..0..0....2..2..0....2..1..1
..0..1..2....2..0..0....1..0..1....0..1..1....2..2..1....0..1..1....0..2..2
CROSSREFS
Sequence in context: A257611 A268617 A264412 * A257620 A032086 A241278
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Dec 25 2011
STATUS
approved

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Last modified April 20 06:23 EDT 2024. Contains 371799 sequences. (Running on oeis4.)