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Search: id:A132587
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| A132587 |
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Let b(k) be the k-th term of the flattened irregular array where the m-th row contains the positive divisors of m. (b(k) = A027750(k).) Let c(k) be the k-th term of the flattened irregular array where the m-th row contains the positive integers that are <= m and are coprime to m. (c(k) = A038566(k).) Then a(n) = GCD(b(n),c(n)). |
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3
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| 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 5, 1
(list; graph; listen)
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OFFSET
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1,8
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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A027750: 1,1,2,1,3,1,2,4,1,5,1,2,3,6,...
A038566: 1,1,1,2,1,3,1,2,3,4,1,5,1,2,...
The 14th terms of each list are 6 and 2.
So a(14) = GCD(6,2) = 2.
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CROSSREFS
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Cf. A132588, A132589, A027750, A038566.
Sequence in context: A073700 A108775 A074971 this_sequence A008651 A049107 A046597
Adjacent sequences: A132584 A132585 A132586 this_sequence A132588 A132589 A132590
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KEYWORD
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more,nonn
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AUTHOR
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Leroy Quet, Aug 23 2007
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