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Search: id:A126356
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| A126356 |
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a(n) is the n-th integer from among the positive integers which are coprime to (n+1). |
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+0
2
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| 1, 2, 5, 4, 13, 6, 13, 11, 21, 10, 31, 12, 29, 26, 29, 16, 49, 18, 47, 34, 45, 22, 67, 29, 53, 38, 61, 28, 107, 30, 61, 52, 69, 48, 103, 36, 77, 61, 97, 40, 143, 42, 93, 82, 93, 46, 139, 55, 121, 79, 109, 52, 157, 73, 127, 88, 117, 58, 221, 60, 125, 107, 125, 86, 215, 66, 141
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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The positive integers which are coprime to 6 are 1,5,7,11,13,17,19,23,...The 5th of these is 13, which is a(5).
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MATHEMATICA
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f[n_] := Block[{k = 0, c = n}, While[c > 0, k++; While[GCD[k, n + 1] > 1, k++ ]; c--; ]; k]; Table[f[n], {n, 67}] (*Chandler*)
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CROSSREFS
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Cf. A069213, A126357.
Sequence in context: A074639 A002314 A094471 this_sequence A121274 A111681 A073122
Adjacent sequences: A126353 A126354 A126355 this_sequence A126357 A126358 A126359
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), Dec 26 2006
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 29 2006
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