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A221634
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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, diagonal and antidiagonal neighbors in a random 0..3 3Xn array
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1
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1, 38, 395, 3848, 32149, 261182, 2095293, 16774816, 134213444, 1073737004, 8589926161, 68719468238, 549755798961, 4398046497376, 35184372064343, 281474976689834, 2251799813647324, 18014398509451874, 144115188075799743
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