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A094171
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Number of quasi-tetrominoes in an n X n bounding box.
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4
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0, 0, 1, 20, 147, 670, 2239, 6138, 14531, 30904, 60369, 110300, 190671, 314910, 500247, 768810, 110300, 190671, 314910, 500247, 768810, 1147959, 1671648
(list; graph; refs; listen; history; internal format)
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