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A205218
Number of (n+1) X (n+1) 0..1 arrays with the number of equal 2 X 2 subblock diagonal pairs and equal antidiagonal pairs differing from each horizontal or vertical neighbor, and new values 0..1 introduced in row major order.
0
8, 52, 328, 2144, 14220, 104404, 811604, 7103748, 67274976, 713213320, 8295727284, 106973119052, 1531000108588
OFFSET
1,1
COMMENTS
Diagonal of A205226.
EXAMPLE
Some solutions for n=4:
..0..0..0..0..0....0..1..0..1..1....0..0..1..1..0....0..1..1..1..1
..1..1..0..0..1....1..1..0..0..0....0..1..0..0..1....0..1..1..0..0
..1..1..0..1..0....1..1..1..1..0....1..0..0..0..0....1..0..1..0..0
..0..0..0..1..1....1..0..0..1..0....1..1..1..0..0....0..0..1..1..1
..0..1..1..1..1....0..1..0..1..1....1..1..0..1..0....0..0..0..0..1
CROSSREFS
Sequence in context: A111996 A016129 A006631 * A287813 A126503 A155590
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 23 2012
STATUS
approved