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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
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
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
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jan 21 2013
STATUS
approved