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A188963
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Number of nX2 array permutations with each element moved and moved by a city block distance of no more than three
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1
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1, 9, 265, 8132, 154564, 2790864, 55327556, 1139362932, 23084210737, 461656617041, 9241940662537, 185683704600857, 3732662042406464, 74976134234530448, 1505525933241030176, 30234928280320748560
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