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Search: id:A067668
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| A067668 |
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a(n)=(3^n)!/3^(floor(3^n/2)). |
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+0 1
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| 2, 4480, 6829776306569216000000, 476828881356392543041592797163461605193984896811956028519492400892855796105719316480000000000000000000
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