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Number of 7 X n 0..1 arrays with row sums equal and column sums unequal to adjacent columns.
0

%I #6 Dec 02 2021 17:59:32

%S 2,128,2802,183220,8870150,578826040,37121438930,2639009446600

%N Number of 7 X n 0..1 arrays with row sums equal and column sums unequal to adjacent columns.

%C Row 7 of A202742.

%e Some solutions for n=3

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

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

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

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

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

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

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

%Y Cf. A202742.

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 23 2011