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A204484
Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly one way, and new values 0..1 introduced in row major order
0
72, 511, 2547, 11137, 43620, 169432, 658793, 2543298, 9877925, 38441749, 149816511, 585601752, 2290712744, 8967902015, 35126111858
OFFSET
1,1
COMMENTS
Diagonal of A204492
EXAMPLE
Some solutions for n=3
..0..1..1..0..0....0..1..1..0..0....0..1..0..0..1....0..0..0..1..1
..1..0..1..1..0....0..0..1..1..0....0..1..1..0..1....1..1..0..0..1
..1..1..0..1..1....1..0..0..1..0....0..0..1..1..0....0..0..1..0..0
..0..0..0..1..0....0..1..0..0..1....1..0..0..0..0....1..1..1..0..1
..1..0..1..1..0....0..0..1..0..0....1..1..0..1..1....1..1..0..0..1
CROSSREFS
Sequence in context: A164377 A156632 A353218 * A235178 A085718 A205329
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 15 2012
STATUS
approved