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Search: id:A128779
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| A128779 |
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a(n) = denominator of product{k=1 to n} (1 +{n/k}), where {x} is the fractional part of x, {x} = x - floor(x). |
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+0
2
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| 1, 1, 2, 3, 8, 5, 60, 63, 896, 189, 5760, 275, 142560, 6435, 256256, 4729725, 40255488, 270725, 916531200, 34613649, 1323008000, 618100875, 412580044800, 1101163525, 13664651083776, 236102414625, 51192627200000, 21986435059875
(list; graph; listen)
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OFFSET
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1,3
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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MAPLE
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a:=n->denom(product(1+frac(n/k), k=1..n)): seq(a(n), n=1..32); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 30 2007
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CROSSREFS
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Cf. A128778.
Sequence in context: A007955 A162537 A109844 this_sequence A112283 A136182 A067911
Adjacent sequences: A128776 A128777 A128778 this_sequence A128780 A128781 A128782
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KEYWORD
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frac,nonn
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AUTHOR
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Leroy Quet Mar 27 2007
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 30 2007
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