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A264705
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Number of 2Xn arrays of permutations of 0..n*2-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 6.
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0
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1, 3, 15, 212, 3712, 96256, 3423168, 158521536, 8362014912, 635861560320, 51551078842368
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