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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

%I

%S 64,8192,854473,72544970,5190742489,323797652462,18095156337973

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

%C Column 7 of A213418

%e Some solutions for n=4

%e ..1..0..0..1..1..1..0....1..1..0..1..1..0..0....0..1..1..0..0..1..0

%e ..1..0..1..1..1..0..0....0..1..0..0..0..1..1....1..1..0..0..0..1..0

%e ..0..0..1..0..1..0..1....0..0..1..0..1..0..0....0..1..1..0..1..1..0

%e ..1..1..0..0..1..1..0....0..1..0..1..1..0..1....0..0..1..0..1..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_ and _N. J. A. Sloane_ Jun 10 2012

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Last modified January 31 01:17 EST 2023. Contains 359947 sequences. (Running on oeis4.)