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A184605
Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one
0
8, 160, 8643, 1396000, 624608260, 771907128421, 2659360843218429, 25614152794948938706
OFFSET
1,1
COMMENTS
Diagonal of A184614
EXAMPLE
Some solutions for 4X4
..1..1..0..1....1..1..1..1....1..0..0..0....0..0..1..1....0..1..0..1
..1..0..1..1....1..1..0..0....0..1..0..0....1..1..1..1....0..1..0..1
..0..1..0..1....1..1..1..1....1..1..0..1....1..0..1..0....1..1..0..1
..0..0..1..0....0..1..0..1....0..0..0..1....1..1..1..1....1..1..1..1
...
...3..2..3.......4..3..2.......2..1..0.......2..3..4.......2..2..2...
...2..2..3.......4..3..2.......3..2..1.......3..3..3.......3..2..2...
...1..2..2.......3..3..3.......2..1..2.......3..3..3.......4..3..3...
CROSSREFS
Sequence in context: A052140 A219265 A300466 * A195607 A064755 A140337
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 18 2011
STATUS
approved