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A196430 T(n,k) = Number of n X k 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than itself. 9
1, 3, 3, 5, 23, 5, 11, 123, 123, 11, 26, 809, 1377, 809, 26, 55, 5274, 27583, 27583, 5274, 55, 119, 33923, 452252, 1436945, 452252, 33923, 119, 263, 219807, 7435275, 67917500, 67917500, 7435275, 219807, 263, 573, 1424725, 126914055, 3308601959 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Table starts
....1........3............5................11..................26
....3.......23..........123...............809................5274
....5......123.........1377.............27583..............452252
...11......809........27583...........1436945............67917500
...26.....5274.......452252..........67917500..........9212529925
...55....33923......7435275........3308601959.......1248257908304
..119...219807....126914055......161187862053.....170481239106658
..263..1424725...2139217341.....7798861912989...23253883615868280
..573..9226721..36014080137...378707068543349.3174860835433669171
.1248.59782080.607371115906.18386677122989718
LINKS
EXAMPLE
Some solutions for n=5, k=3
..0..0..0....0..0..1....0..0..2....0..0..2....0..0..0....0..0..0....0..0..0
..1..3..0....3..0..1....0..0..0....3..0..0....3..0..0....1..3..1....1..4..2
..2..4..2....2..0..1....0..4..2....1..2..3....0..4..0....2..4..2....2..3..0
..0..2..1....0..4..2....3..0..1....0..4..1....0..0..3....0..0..0....0..2..2
..0..2..0....1..2..0....1..0..1....0..0..0....0..0..1....1..1..2....2..1..0
CROSSREFS
Sequence in context: A215912 A157241 A365083 * A366594 A265878 A201496
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Oct 02 2011
STATUS
approved

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Last modified May 30 04:46 EDT 2024. Contains 372958 sequences. (Running on oeis4.)