login
A207989
T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically
7
3, 9, 9, 25, 81, 25, 69, 625, 625, 69, 191, 4761, 12468, 4761, 191, 529, 36481, 244325, 244325, 36481, 529, 1465, 279841, 4827482, 12271227, 4827482, 279841, 1465, 4057, 2146225, 95527856, 622569385, 622569385, 95527856, 2146225, 4057, 11235
OFFSET
1,1
COMMENTS
Table starts
....3........9..........25.............69................191
....9.......81.........625...........4761..............36481
...25......625.......12468.........244325............4827482
...69.....4761......244325.......12271227..........622569385
..191....36481.....4827482......622569385........81269646503
..529...279841....95527856....31638012071.....10629041648848
.1465..2146225..1889730415..1607243845009...1389619561706920
.4057.16459249.37378616643.81641053794111.181656690367717549
LINKS
EXAMPLE
Some solutions for n=4 k=3
..2..2..0....2..1..0....1..2..2....2..1..0....0..0..0....2..1..2....1..2..2
..0..0..2....2..1..2....0..0..1....0..1..1....2..0..2....1..2..2....2..1..2
..2..0..0....2..1..1....2..2..0....1..0..2....2..0..1....0..2..1....2..0..1
..1..0..1....0..1..1....1..2..2....1..2..2....0..0..0....2..1..0....2..2..1
CROSSREFS
Column 1 is A098182(n+1)
Column 2 is A206857
Sequence in context: A207201 A206863 A206957 * A207221 A217999 A207550
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Feb 22 2012
STATUS
approved