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A229670
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Number of defective 4-colorings of an nX6 0..3 array connected horizontally, antidiagonally and vertically with exactly two mistakes, and colors introduced in row-major 0..3 order
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1
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50, 33152, 1673561, 50919512, 1289285440, 29775277216, 649844491552, 13636997291008, 277914152727936, 5535687600455328, 108250711858308992, 2084927957331161856, 39646876001815559424, 745764910064051742464
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