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A221001 T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor 5
1, 3, 3, 8, 31, 8, 21, 306, 306, 21, 55, 2989, 11017, 2989, 55, 144, 29135, 394580, 394580, 29135, 144, 377, 283872, 14113081, 51672851, 14113081, 283872, 377, 987, 2765627, 504635391, 6758547145, 6758547145, 504635391, 2765627, 987, 2584 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Table starts
....1.........3............8..............21...............55..............144
....3........31..........306............2989............29135...........283872
....8.......306........11017..........394580.........14113081........504635391
...21......2989.......394580........51672851.......6758547145.....883809591160
...55.....29135.....14113081......6758547145....3229188933738.1542208831960569
..144....283872....504635391....883809591160.1542208831960569
..377...2765627..18042682111.115571009291599
..987..26943707.645084293748
.2584.262494146
.6765
LINKS
EXAMPLE
Some solutions for n=3 k=4
..0..0..1..0....0..1..2..0....0..0..1..0....0..1..0..0....0..0..4..1
..2..1..0..1....2..2..0..0....2..2..1..1....1..2..2..4....2..2..0..1
..1..2..1..3....0..2..0..3....1..0..4..0....1..0..1..0....1..0..0..1
CROSSREFS
Column 1 is A001906
Sequence in context: A267952 A221773 A101126 * A222093 A221165 A221776
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Dec 28 2012
STATUS
approved

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Last modified May 26 18:06 EDT 2024. Contains 372840 sequences. (Running on oeis4.)