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A204963
Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally at least two different ways, and new values 0..1 introduced in row major order
0
166, 10416, 1858301, 916967622, 1294422106052, 5180662454351231, 58780083916064047171
OFFSET
1,1
COMMENTS
Diagonal of A204971
EXAMPLE
Some solutions for n=3
..0..0..0..0..1....0..0..0..0..0....0..0..0..0..1....0..0..1..0..0
..1..1..1..1..0....1..1..0..1..0....1..0..0..0..0....1..0..1..1..1
..0..1..1..1..1....1..1..1..1..1....0..1..0..1..1....0..0..1..1..1
..0..0..1..1..1....1..1..1..1..0....1..1..1..1..1....1..0..1..0..0
..1..1..1..0..0....0..1..0..0..1....1..1..0..0..0....1..0..0..0..0
CROSSREFS
Sequence in context: A241969 A193984 A144380 * A011815 A188413 A144929
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 21 2012
STATUS
approved