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A207275
Number of n X n 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column, diagonal or antidiagonal
0
4, 256, 121014, 553738958, 23419301672964
OFFSET
1,1
COMMENTS
Diagonal of A207283
EXAMPLE
Some solutions for n=4
..1..2..0..2....0..0..3..1....2..3..3..3....0..2..1..1....1..1..3..2
..2..1..0..3....3..0..1..1....1..1..1..3....0..2..1..0....0..1..1..3
..2..3..0..3....1..3..2..1....3..3..1..3....2..3..1..0....3..1..3..3
..3..3..0..2....1..3..2..2....1..3..3..3....1..1..0..3....2..1..1..2
CROSSREFS
Sequence in context: A122249 A326556 A223795 * A207473 A223658 A207529
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 16 2012
STATUS
approved