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Half the number of nX7 binary arrays with no 3X3 submatrix formed with any three rows and columns equal to J-I

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`%I #3 Jun 10 2012 22:02:38
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`%S 64,8192,854473,72544970,5190742489,323797652462,18095156337973
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`%N Half the number of nX7 binary arrays with no 3X3 submatrix formed with any three rows and columns equal to J-I
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`%C Column 7 of A213418
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`%e Some solutions for n=4
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`%e ..1..0..0..1..1..1..0....1..1..0..1..1..0..0....0..1..1..0..0..1..0
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`%e ..1..0..1..1..1..0..0....0..1..0..0..0..1..1....1..1..0..0..0..1..0
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`%e ..0..0..1..0..1..0..1....0..0..1..0..1..0..0....0..1..1..0..1..1..0
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`%e ..1..1..0..0..1..1..0....0..1..0..1..1..0..1....0..0..1..0..1..0..1
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`%K nonn
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`%O 1,1
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`%A _R. H. Hardin_ and _N. J. A. Sloane_ Jun 10 2012
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