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A105054
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a(n) is the n-th positive integer among those which do not occur earlier in the sequence and which are coprime to n.
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1
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1, 5, 7, 13, 8, 29, 11, 25, 22, 37, 17, 61, 20, 51, 44, 49, 27, 85, 32, 77, 59, 75, 38, 113, 47, 93, 68, 101, 45, 163, 52, 105, 83, 115, 76, 167, 58, 131, 103, 149, 66, 221, 70, 153, 133, 155, 74, 223, 90, 187, 127, 183, 87, 251, 109, 207, 142, 193, 95, 329, 98, 205, 173
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OFFSET
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1,2
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LINKS
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EXAMPLE
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a(4) is the 4th positive integer coprime to 4 and not among the first 3 terms of the sequence (i.e. the 4th term among 3, 9, 11, 13, 15,...).
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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