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A263583
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Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 filled by rows with each element moved a city block distance of 1 or 2, and rows and columns in increasing lexicographic order.
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1
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6, 134, 3035, 69084, 1643235, 38562523, 903637375, 21206120278, 497781904012, 11682193577941, 274165517770655, 6434456922985871, 151011586126096748, 3544112130933243384, 83177316133805461631, 1952101836234127241441
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