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Search: id:A063917
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| A063917 |
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Smallest k such that k!!! is a multiple of n. |
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+0
1
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| 1, 2, 3, 4, 5, 6, 7, 8, 6, 5, 11, 12, 13, 7, 15, 8, 17, 6, 19, 10
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Also called Smarandache triple factorials.
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REFERENCES
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F. Smarandache, "Some problems in number theory", Student Conference, University of Craiova, Department of Mathematics, 1979.
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LINKS
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Anonymous, Smarandache k-factorial
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EXAMPLE
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a(16)=8 because 8!!!=8x(8-3)x(8-6)=8x5x2 which is divisible by 16 and 8 is the smallest integer with this property.
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CROSSREFS
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Sequence in context: A043268 A160597 A097377 this_sequence A073795 A017893 A017883
Adjacent sequences: A063914 A063915 A063916 this_sequence A063918 A063919 A063920
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KEYWORD
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nonn
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AUTHOR
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Mike Antholy (mikeantholy(AT)yahoo.ca), Aug 31 2001
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