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Search: id:A120841
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| A120841 |
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a(n) = the n-th positive integer which is coprime to the number of positive divisors of n. |
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+0
2
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| 1, 3, 5, 5, 9, 11, 13, 15, 13, 19, 21, 35, 25, 27, 29, 19, 33, 53, 37, 59, 41, 43, 45, 47, 37, 51, 53, 83, 57, 59, 61, 95, 65, 67, 69, 53, 73, 75, 77, 79, 81, 83, 85, 131, 133, 91, 93, 119, 73, 149, 101, 155, 105, 107, 109, 111, 113, 115, 117, 179, 121, 123, 187, 74, 129
(list; graph; listen)
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OFFSET
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1,2
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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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12 has 6 positive divisors. 1,5,7,11,13,17,19,23,25,29,31,35,37,...is the sequence of positive integers which are coprime to 6. 35 is the 12th of these integers, so a(12) = 35.
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CROSSREFS
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Cf. A000005.
Sequence in context: A087349 A090792 A076877 this_sequence A145282 A049757 A155537
Adjacent sequences: A120838 A120839 A120840 this_sequence A120842 A120843 A120844
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet Aug 18 2006
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 22 2006
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