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Search: id:A140694
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| 1, 4, 9, 6, 25, 6, 49, 12, 24, 10, 121, 9, 169, 14
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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a(n) = n^2 iff n is prime.
a(n) = n iff mu(n) = 1.
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FORMULA
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A014963(n) * A063659(n). A140579 as an infinite lower triangular matrix * A063659 as a vector, where A063659 = (1, 2, 3, 3, 5, 6, 7, 6, 8, 10,...)
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EXAMPLE
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a(4) = 6 = A014963(4) * A063659(4) = 2 * 3.
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CROSSREFS
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Cf. A140579, A014963, A008683.
Sequence in context: A141553 A095065 A061207 this_sequence A152454 A074767 A016097
Adjacent sequences: A140691 A140692 A140693 this_sequence A140695 A140696 A140697
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KEYWORD
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nonn
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AUTHOR
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Gary W. Adamson & Mats Granvik (qntmpkt(AT)yahoo.com), May 23 2008
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