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Search: id:A057997
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| A057997 |
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Number of labeled loops (quasigroups with an identity element). |
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+0
2
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| 1, 2, 3, 16, 280, 56448, 118594560, 4282251214848, 3398378138678329344, 75807214831601328114892800
(list; graph; listen)
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