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A221292 Equals two maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 4Xn array 0

%I

%S 1,37,556,9107,172904,2890017,49684593,821323042,13475380990

%N Equals two maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 4Xn array

%C Row 4 of A221290

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 09 2013

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Last modified July 24 09:52 EDT 2021. Contains 346273 sequences. (Running on oeis4.)