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A221662 Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..2 4Xn array 0

%I

%S 1,128,2735,58710,1016831,16705642,268216870,4294510063,68718137467,

%T 1099507659647,17592163496919

%N Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..2 4Xn array

%C Row 4 of A221660

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 21 2013

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Last modified May 26 21:56 EDT 2022. Contains 354092 sequences. (Running on oeis4.)