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A055082
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Number of 4 X n binary matrices with no zero rows or columns, up to row and column permutation.
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2
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1, 8, 42, 179, 633, 2001, 5745, 15274, 38000, 89331, 199715, 427184, 878152, 1741964, 3345562, 6239390, 11327863, 20065972, 34747460, 58924066
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