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A203978
Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order
0
6, 144, 7776, 956448, 271918944, 180709558848, 281455764775776, 1031010515432951328, 8894627860916158754400, 180980943906416856129607680
OFFSET
1,1
COMMENTS
Diagonal of A203984
EXAMPLE
Some solutions for n=4
..0..1..0..2..1....0..1..1..1..1....0..0..0..1..1....0..0..0..0..1
..2..1..0..2..0....2..2..2..2..0....2..2..2..2..2....1..1..1..2..1
..0..1..0..2..0....1..0..1..1..0....0..0..0..0..1....0..0..0..0..0
..2..1..0..1..1....1..0..2..2..2....1..1..1..2..1....1..2..1..1..1
..2..1..0..2..2....1..0..1..0..1....0..2..0..2..0....1..2..0..2..2
CROSSREFS
Sequence in context: A010043 A270504 A085905 * A090443 A307416 A133460
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2012
STATUS
approved