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Number of n X n 0..1 arrays with row sums equal and no column sum equal to the previous
0

%I #6 Dec 18 2015 18:17:56

%S 2,2,38,838,75302,27842760,37121438930,192513188823366

%N Number of n X n 0..1 arrays with row sums equal and no column sum equal to the previous

%C Column 1 of A202714

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 23 2011