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Search: id:A133581
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| A133581 |
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(k^2)-th k-smooth number for k = prime(n). |
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+0
1
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OFFSET
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1,1
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COMMENT
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An integer is k-smooth if it has no prime factors > k.
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LINKS
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Eric Weisstein's World of Mathematics, Smooth Number
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FORMULA
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a(n) = A001248(n)-th integer which has no prime factors > A000040(n).
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EXAMPLE
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a(1) = 8 = A000079(4).
a(2) = 18 = A003586(9).
a(3) = 54 = A051037(25)
a(4) = 784 = A08194(49).
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CROSSREFS
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Cf. A000040, A000079, A001248, A003586, A051037, A002473, A051038.
Sequence in context: A109988 A066721 A079704 this_sequence A032795 A120543 A036747
Adjacent sequences: A133578 A133579 A133580 this_sequence A133582 A133583 A133584
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KEYWORD
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more,nonn,less
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AUTHOR
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Jonathan Vos Post (jvospost2(AT)yahoo.com), Dec 26 2007
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