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Search: id:A140306
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| A140306 |
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Number of n X n binary matrices containing at most three 1's in any 3 X 3 sub-block. |
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+0
1
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| 1, 2, 15, 130, 4852, 456904, 73948482, 35616138799, 43142990277818, 115017363443317954, 771239506285440035857
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