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A220581
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Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 3Xn array
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1
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1, 32, 91, 1441, 8334, 64497, 436288, 3036588, 21023792, 146254012, 1011489196, 7016643627, 48603225482, 336693889957, 2332461879768, 16156948253940, 111913294295697, 775187951935208, 5369332881497134, 37190288381188178
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