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A221773
T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out left turns
5
1, 3, 3, 8, 27, 8, 21, 240, 240, 21, 55, 2127, 7371, 2127, 55, 144, 18828, 225873, 225873, 18828, 144, 377, 166581, 6916881, 23965217, 6916881, 166581, 377, 987, 1473549, 211747695, 2541024755, 2541024755, 211747695, 1473549, 987, 2584, 13033908
OFFSET
1,2
COMMENTS
Table starts
....1.........3............8.............21..............55.............144
....3........27..........240...........2127...........18828..........166581
....8.......240.........7371.........225873.........6916881.......211747695
...21......2127.......225873.......23965217......2541024755....269350655878
...55.....18828......6916881.....2541024755....932759231192.342291992210642
..144....166581....211747695...269350655878.342291992210642
..377...1473549...6481445220.28548644230368
..987..13033908.198382906386
.2584.115285587
.6765
LINKS
EXAMPLE
Some solutions for n=3 k=4
..1..0..1..1....0..0..2..0....1..0..1..1....1..0..1..1....1..1..1..2
..1..2..4..0....3..0..3..2....1..3..2..1....1..2..2..3....1..0..1..2
..1..0..1..0....1..0..1..0....1..0..1..0....0..0..1..0....1..0..0..2
CROSSREFS
Column 1 is A001906
Sequence in context: A202536 A038068 A267952 * A101126 A221001 A222093
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jan 25 2013
STATUS
approved