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A221288 Equals two maps: number of nX5 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 nX5 array.

%I A221288 #5 Jul 23 2025 01:49:00
%S A221288 7,200,5912,172904,4983598,143511784,4129628435,118813480496,
%T A221288 3418203388701,98338490101681,2829094038032543,81389941488977962,
%U A221288 2341498869979723606,67362334665049967042,1937939871911867309221
%N A221288 Equals two maps: number of nX5 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 nX5 array.
%C A221288 Column 5 of A221290
%e A221288 Some solutions for n=3
%e A221288 ..0..1..1..0..1....0..0..0..0..0....0..0..0..0..0....0..0..0..1..0
%e A221288 ..1..0..0..1..1....0..0..0..0..0....0..0..0..0..1....1..1..1..1..1
%e A221288 ..0..0..0..1..0....1..0..1..0..0....1..1..1..1..0....0..0..1..0..0
%K A221288 nonn
%O A221288 1,1
%A A221288 _R. H. Hardin_ Jan 09 2013