|
%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
| 