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A268166
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Number of nX3 0..3 arrays with every repeated value in every row and column one larger mod 4 than the previous repeated value, and upper left element zero.
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1
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15, 900, 44517, 2059071, 88808673, 3660830427, 145301219913, 5600451934263, 210693318976809, 7769692483541913, 281740543748278353, 10071425144186095647, 355636339335520541583, 12425488243555670885277
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