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Search: id:A109721
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| A109721 |
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Number of different ways of selecting n non-empty cells in a 4 X 4 binary matrix, excluding all rotationally and symetrically equivalent matrices. |
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1
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| 1, 3, 21, 77, 252, 567, 1051, 1465, 1674, 1465, 1051, 567, 252, 77, 21, 3, 1
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