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A186571
Number of (n+2)X(n+2) 0..6 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock
0
40353607, 2295, 155811, 6144163, 20145619, 24109915, 33341515, 63091963, 185353627, 1030573051, 4642181947, 16031111611
OFFSET
1,1
COMMENTS
Diagonal of A186572
EXAMPLE
Some solutions for 4X4
..5..1..4..5....0..6..6..0....0..0..0..0....2..0..0..0....0..1..4..3
..4..5..1..4....3..0..6..6....4..0..0..0....0..0..0..0....0..0..1..4
..1..4..5..1....3..3..0..6....1..4..0..0....0..0..0..0....0..0..0..1
..5..1..4..5....0..3..3..0....1..1..4..0....0..0..0..4....0..0..0..0
CROSSREFS
Sequence in context: A218390 A186617 A186960 * A186572 A016929 A016989
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 23 2011
STATUS
approved