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Search: id:A140269
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| A140269 |
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A number n is included if GCD((largest divisor of n that is <= sqrt(n)),(smallest divisor of n that is >=sqrt(n))) > 1. |
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+0
2
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| 4, 8, 9, 16, 18, 24, 25, 27, 32, 36, 48, 49, 50
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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The divisors of 48 are 1,2,3,4,6,8,12,16,24,48. The middle two of these divisors are 6 and 8, which are not coprime. So 48 is included in this sequence.
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CROSSREFS
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Cf. A033676, A033677, A140270.
Adjacent sequences: A140266 A140267 A140268 this_sequence A140270 A140271 A140272
Sequence in context: A034023 A086368 A034024 this_sequence A070003 A073539 A090779
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KEYWORD
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more,nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), May 16 2008
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