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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

R. H. Hardin, Table of n, a(n) for n = 1..60

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

Adjacent sequences:  A220998 A220999 A221000 * A221002 A221003 A221004

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 28 2012

STATUS

approved

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Last modified September 28 00:01 EDT 2022. Contains 357063 sequences. (Running on oeis4.)