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A180375
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1/120 the number of n X 4 arrays of integers in 1..6 with no element or any of its neighbors having the same value.
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1
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4, 147, 1236, 11586, 100704, 909780, 8061360, 72279888, 644409672, 5763665256, 51460343508, 459865182720, 4107418650972, 36696235666668, 327803328407400, 2928457191806580, 26160556962790800, 233703185202652428
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OFFSET
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1,1
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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