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A252270
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7
1
206, 300, 1407, 4895, 67509, 1181875, 5767680, 279737770, 16717863291, 96797935205, 16989739529599, 3629146902096812, 22980857590950669, 14887212701710994967, 11651691211105625876242, 77285480456872335366242
OFFSET
1,1
COMMENTS
Diagonal of A252278
LINKS
EXAMPLE
Some solutions for n=4
..2..3..3..2..3..3....3..2..0..3..2..3....3..3..2..3..0..2....2..1..2..2..1..2
..1..2..2..1..2..2....0..2..3..3..2..0....2..2..1..2..2..1....3..2..3..0..2..3
..2..3..3..2..3..3....2..1..2..2..1..2....0..3..2..3..3..2....0..2..3..3..2..0
..2..3..0..2..3..0....3..2..3..3..2..3....3..3..2..3..0..2....2..1..2..2..1..2
..1..2..2..1..2..2....3..2..3..0..2..3....2..2..1..2..2..1....3..2..3..3..2..3
..2..3..3..2..3..3....2..1..2..2..1..2....3..3..2..3..3..2....3..2..3..3..2..3
CROSSREFS
Sequence in context: A025351 A025343 A222619 * A113934 A260101 A113490
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved