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A206832
Number of n X n 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal
0
4, 256, 205518, 2152805235, 289315497297232, 503617001775793994676
OFFSET
1,1
COMMENTS
Diagonal of A206838
EXAMPLE
Some solutions for n=5
..3..2..2..1..1....1..3..3..1..2....1..2..0..2..2....0..0..1..3..0
..3..2..0..1..0....0..2..2..1..2....1..0..3..2..2....2..0..3..0..2
..3..3..1..3..2....0..0..1..0..2....0..2..3..3..0....0..3..1..1..2
..2..1..1..2..2....2..0..1..3..2....1..2..0..2..3....0..3..0..1..0
..0..1..3..1..0....0..0..0..0..1....1..1..1..3..3....3..2..2..1..2
CROSSREFS
Sequence in context: A207051 A207128 A223579 * A206894 A207284 A229100
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 13 2012
STATUS
approved