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A217273 T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor 7
0, 1, 1, 2, 9, 2, 4, 64, 64, 4, 8, 441, 1472, 441, 8, 16, 3025, 33856, 33856, 3025, 16, 32, 20736, 772800, 2572816, 772800, 20736, 32, 64, 142129, 17640000, 194881600, 194881600, 17640000, 142129, 64, 128, 974169, 402494400, 14755689729 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Table starts

....0..........1...............2..................4.....................8

....1..........9..............64................441..................3025

....2.........64............1472..............33856................772800

....4........441...........33856............2572816.............194881600

....8.......3025..........772800..........194881600...........48909857500

...16......20736........17640000........14755689729........12276607432401

...32.....142129.......402494400......1117092569476......3080781263731464

...64.....974169......9183772224.....84567501131481....773143936621737444

..128....6677056....209543184576...6401965110822961.194021789111058265560

..256...45765225...4781079618624.484642857129680209

..512..313679521.109088244863424

.1024.2149991424

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..97

EXAMPLE

Some solutions for n=3 k=4

..0..1..0..2....0..2..2..1....0..2..2..1....1..0..0..1....1..0..1..1

..1..1..2..2....1..0..1..1....1..2..1..0....1..1..1..1....3..1..2..0

..2..0..1..0....1..1..2..0....0..1..2..0....0..2..3..1....1..0..2..0

CROSSREFS

Column 2 is A049684

Sequence in context: A153460 A248695 A221139 * A188981 A277754 A112537

Adjacent sequences:  A217270 A217271 A217272 * A217274 A217275 A217276

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Sep 29 2012

STATUS

approved

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Last modified October 16 23:12 EDT 2018. Contains 316275 sequences. (Running on oeis4.)