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A203191 T(n,k)=Number of nXk 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor 9
1, 5, 5, 25, 165, 25, 95, 3209, 3209, 95, 325, 53233, 263725, 53233, 325, 1121, 904175, 19617781, 19617781, 904175, 1121, 3985, 15703631, 1508941377, 6474088455, 1508941377, 15703631, 3985, 14288, 271942421, 117061422325, 2202928769005 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Table starts
.....1..........5..............25...................95
.....5........165............3209................53233
....25.......3209..........263725.............19617781
....95......53233........19617781...........6474088455
...325.....904175......1508941377........2202928769005
..1121...15703631....117061422325......754868206701309
..3985..271942421...9045835238617...257892549401944763
.14288.4694586685.698574745175731.88078489175441149541
LINKS
EXAMPLE
Some solutions for n=4 k=4
..3..3..1..0....1..3..2..4....2..3..4..2....0..1..1..1....4..1..2..1
..1..3..0..1....1..4..4..4....2..2..4..0....3..3..3..1....4..4..2..4
..4..2..3..2....1..3..0..0....0..1..0..1....1..2..2..2....3..1..2..4
..4..0..3..0....3..3..2..0....2..2..4..4....3..3..1..0....0..1..2..4
CROSSREFS
Sequence in context: A176160 A222281 A214706 * A165423 A220078 A302000
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Dec 30 2011
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)