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A226198
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a(n) = floor((n-1)!/n).
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4
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1, 0, 0, 1, 4, 20, 102, 630, 4480, 36288, 329890, 3326400, 36846276, 444787200, 5811886080, 81729648000, 1230752346352, 19760412672000, 336967037143578, 6082255020441600, 115852476579840000, 2322315553259520000, 48869596859895986086
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OFFSET
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1,5
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COMMENTS
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(h-1)!/h is integer if h belongs to A056653.
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LINKS
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MATHEMATICA
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Table[Quotient[(n - 1)!, n], {n, 25}]
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PROG
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(Magma) [Floor(Factorial(n-1)/n): n in [1..25]];
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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