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A133581
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(k^2)-th k-smooth number for k = prime(n).
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0
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8, 16, 54, 112, 396, 512, 1008, 1155, 1794, 3312, 3520, 5488, 6776, 7020, 8405, 11180, 14384, 14720, 18241, 20339, 20709, 24769, 27094, 31648, 38994, 41890, 42336, 45318, 45825, 48852, 66234, 69874
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| An integer is k-smooth if it has no prime factors > k.
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LINKS
| Eric Weisstein's World of Mathematics, Smooth Number
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FORMULA
| a(n) = A001248(n)-th integer which has no prime factors > A000040(n).
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EXAMPLE
| a(1) = 8 = A000079(4).
a(2) = 16 = A003586(9).
a(3) = 54 = A051037(25).
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CROSSREFS
| Cf. A000040, A000079, A001248, A003586, A051037, A002473, A051038.
Sequence in context: A089828 A188825 A159038 * A166638 A082982 A157164
Adjacent sequences: A133578 A133579 A133580 * A133582 A133583 A133584
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KEYWORD
| nonn,less
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AUTHOR
| Jonathan Vos Post (jvospost3(AT)gmail.com), Dec 26 2007
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EXTENSIONS
| Corrected and extended by D. S. McNeil (mcneil(AT)hku.hk), Dec 08 2010
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