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Search: id:A140189
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| A140189 |
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Number of groupoids (categories all of whose morphisms are invertible) with n morphisms. |
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3
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| 1, 1, 2, 3, 7, 9, 16, 22, 42, 57, 90, 124, 204, 275, 413, 562, 866, 1161, 1685, 2264, 3308, 4407
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