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A221676 T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, without move-in move-out left turns 4
0, 1, 1, 2, 5, 2, 4, 27, 27, 4, 8, 139, 400, 139, 8, 16, 715, 5741, 5741, 715, 16, 32, 3666, 81910, 229150, 81910, 3666, 32, 64, 18787, 1165913, 9062913, 9062913, 1165913, 18787, 64, 128, 96249, 16583044, 357398390, 991851048, 357398390, 16583044 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Table starts

...0......1.........2...........4............8...........16.............32

...1......5........27.........139..........715.........3666..........18787

...2.....27.......400........5741........81910......1165913.......16583044

...4....139......5741......229150......9062913....357398390....14082457465

...8....715.....81910.....9062913....991851048.108150839224.11781343567340

..16...3666...1165913...357398390.108150839224

..32..18787..16583044.14082457465

..64..96249.235810525

.128.493063

.256

LINKS

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

EXAMPLE

Some solutions for n=3 k=4

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

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

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

CROSSREFS

Sequence in context: A220247 A220319 A220342 * A073054 A010695 A021400

Adjacent sequences:  A221673 A221674 A221675 * A221677 A221678 A221679

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 21 2013

STATUS

approved

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Last modified September 28 00:09 EDT 2022. Contains 357063 sequences. (Running on oeis4.)