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 A220938 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..2 4Xn array 0

%I

%S 1,37,556,9107,172904,2876430,49406891

%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..2 4Xn array

%C Row 4 of A220935

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Dec 25 2012

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Last modified March 28 16:30 EDT 2023. Contains 361596 sequences. (Running on oeis4.)