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A082553
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Number of sets of distinct positive integers whose geometric mean is an integer, the largest integer of a set is n.
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0
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1, 1, 1, 3, 1, 1, 1, 3, 7, 1, 1, 7, 1, 1, 1, 9, 1, 29, 1, 3, 1, 1, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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COMMENTS
| a(n) = 1 if and only if n is squarefree (i.e., if and only if n is in A005117). - Nathaniel Johnston, Apr 28 2011
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EXAMPLE
| a(4) = 3: the three sets are {4}, {1, 4}, {1, 2, 4}.
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CROSSREFS
| Cf. A005117.
Sequence in context: A176246 A016466 A055210 * A195644 A143632 A130605
Adjacent sequences: A082550 A082551 A082552 * A082554 A082555 A082556
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KEYWORD
| more,nonn
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AUTHOR
| Naohiro Nomoto (n_nomoto(AT)yabumi.com), May 03 2003
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