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A221873
T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without consecutive moves in the same direction
4
0, 1, 1, 0, 20, 0, 1, 162, 162, 1, 0, 1442, 2847, 1442, 0, 1, 12688, 109441, 109441, 12688, 1, 0, 110720, 2902629, 14388224, 2902629, 110720, 0, 1, 970828, 89325897, 1572414124, 1572414124, 89325897, 970828, 1, 0, 8489090, 2568285560
OFFSET
1,5
COMMENTS
Table starts
.0.......1..........0............1............0............1..............0
.1......20........162.........1442........12688.......110720.........970828
.0.....162.......2847.......109441......2902629.....89325897.....2568285560
.1....1442.....109441.....14388224...1572414124.180850094177.20435867743591
.0...12688....2902629...1572414124.598006815909
.1..110720...89325897.180850094177
.0..970828.2568285560
.1.8489090
.0
LINKS
EXAMPLE
Some solutions for n=3 k=4
..0..0..0..2....2..0..0..2....0..1..1..1....0..1..1..0....1..1..1..0
..3..2..2..1....2..2..1..0....3..1..0..3....2..1..0..0....1..3..0..2
..1..0..1..0....1..0..1..1....0..1..1..0....1..2..3..1....1..1..0..1
CROSSREFS
Sequence in context: A023921 A072840 A091234 * A278073 A365912 A324274
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jan 28 2013
STATUS
approved