login
A205512
Number of (n+1)X(n+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor
0
81, 2412, 205803, 44160240, 25618992453, 37886453633808, 153727495029223899, 1571194548319712891100
OFFSET
1,1
COMMENTS
Diagonal of A205520
EXAMPLE
Some solutions for n=4
..1..2..0..0..1....2..0..1..2..0....1..1..1..0..0....0..1..0..0..2
..2..2..1..1..0....2..2..1..2..1....1..0..2..0..0....1..2..0..0..1
..1..0..0..2..0....1..0..1..0..1....2..1..2..1..0....2..2..1..1..2
..0..0..0..2..1....2..2..0..0..2....1..1..0..0..2....1..0..0..2..2
..2..1..1..0..0....1..0..0..0..1....0..2..0..0..2....0..0..0..1..0
CROSSREFS
Sequence in context: A128832 A085877 A123219 * A297606 A236729 A236147
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 28 2012
STATUS
approved