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A252335
Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 or 4
1
52, 268, 2978, 43708, 960912, 33579112, 1793526072, 147518483334, 18786369968734, 3677603612834944, 1107920643675524618, 515039036348578802392, 369081216309162786350824
OFFSET
1,1
COMMENTS
Diagonal of A252343
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0..1..0....1..0..0..0..0..0....0..0..0..1..0..0....2..2..2..2..2..1
..1..0..0..0..0..0....0..0..0..1..0..0....0..0..0..0..0..0....2..2..1..2..2..2
..0..0..0..0..0..1....0..0..0..0..0..1....1..0..0..0..1..0....2..2..2..2..2..2
..0..0..0..1..0..0....0..0..1..0..0..0....0..0..0..0..0..0....2..2..2..2..2..2
..0..0..0..0..0..0....1..0..0..0..1..0....0..0..0..0..0..0....2..2..2..2..2..2
..1..0..0..0..0..0....0..0..0..0..0..0....1..0..0..0..1..0....1..2..2..2..1..2
CROSSREFS
Sequence in context: A070147 A236517 A320556 * A230533 A235654 A118328
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved