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A213417
Half the number of nX7 binary arrays with no 3X3 submatrix formed with any three rows and columns equal to J-I
0
64, 8192, 854473, 72544970, 5190742489, 323797652462, 18095156337973
OFFSET
1,1
COMMENTS
Column 7 of A213418
EXAMPLE
Some solutions for n=4
..1..0..0..1..1..1..0....1..1..0..1..1..0..0....0..1..1..0..0..1..0
..1..0..1..1..1..0..0....0..1..0..0..0..1..1....1..1..0..0..0..1..0
..0..0..1..0..1..0..1....0..0..1..0..1..0..0....0..1..1..0..1..1..0
..1..1..0..0..1..1..0....0..1..0..1..1..0..1....0..0..1..0..1..0..1
CROSSREFS
Sequence in context: A302014 A302009 A301783 * A316807 A317524 A299653
KEYWORD
nonn
AUTHOR
STATUS
approved