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A205602
Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..3 introduced in row major order
0
15, 1030, 229445, 146904738, 219511132715, 1046956456530150
OFFSET
1,1
COMMENTS
Diagonal of A205609
EXAMPLE
Some solutions for n=4
..0..0..0..1..0....0..0..1..2..1....0..0..0..0..1....0..0..1..0..0
..2..2..0..0..0....1..1..1..2..1....1..0..2..0..1....2..3..3..3..1
..0..1..1..3..1....3..0..3..2..3....0..2..3..1..0....3..3..0..3..1
..0..0..1..3..1....2..1..2..0..1....3..2..0..1..2....1..2..2..2..2
..3..2..2..2..2....1..1..2..0..1....0..1..2..3..0....1..1..1..2..0
CROSSREFS
Sequence in context: A082158 A064625 A241331 * A370735 A233509 A206162
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 29 2012
STATUS
approved