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A263818
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Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change (+-,+-) 0,0 0,1 0,2 or 1,0
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1
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32, 948, 18776, 333429, 6425985, 124854432, 2392853088, 45898515536, 882504683737, 16961728977667, 325906704633704, 6262921821080860, 120359817883976272, 2313001901843303293, 44449848853940930817
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