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A252449
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7
0
661, 334, 3366, 48170, 1058050, 36760486, 1956458824, 160517960252, 20418505768994, 3997026837680912, 1204054337705584421, 559547936390811196991
OFFSET
1,1
COMMENTS
Diagonal of A252457
EXAMPLE
Some solutions for n=4
..1..1..1..1..1..1....3..3..2..3..3..3....3..3..3..3..3..3....1..1..1..1..1..3
..3..1..1..3..1..1....2..3..3..3..3..3....3..3..3..3..3..2....1..1..1..1..1..1
..1..1..1..1..1..1....3..3..3..3..3..3....3..2..3..3..3..3....1..1..1..1..3..1
..1..1..1..1..1..1....3..3..3..3..3..2....3..3..3..3..3..3....1..1..1..1..1..1
..1..1..1..1..3..1....2..3..3..3..3..3....3..3..3..3..3..3....3..1..1..1..1..1
..1..1..3..1..1..1....3..3..2..3..3..3....3..3..3..2..3..3....1..3..1..1..3..1
CROSSREFS
Sequence in context: A342994 A252457 A252450 * A252401 A171394 A243886
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved