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Search: id:A093866
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| A093866 |
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a(0) =1 then a(n) is the least number such that there are exactly n coprime numbers to a(n-1) between a(n-1) and a(n) (excluded). |
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1
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| 1, 3, 6, 14, 24, 38, 50, 68, 84, 114, 146, 168, 210, 264, 308, 348, 398, 432, 486, 542, 582, 644, 698, 744, 818, 868, 930, 1034, 1098, 1188, 1286, 1348, 1412, 1478, 1546, 1616, 1688, 1762, 1838, 1916, 1996, 2078, 2162, 2254, 2362, 2452, 2544, 2688, 2856
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Obviously a(3) onwards all terms are even.
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EXAMPLE
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a(5) = 24, a(60 = 38 and the five numbers coprime to 24 are 25,29,31,35 and 37.
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MATHEMATICA
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k = 1; Print[k]; Do[v = 0; m = k + 1; While[v < n, If[GCD[m, k] == 1, v++ ]; m++ ]; k = m; Print[k], {n, 1, 50}] (Propper)
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CROSSREFS
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Adjacent sequences: A093863 A093864 A093865 this_sequence A093867 A093868 A093869
Sequence in context: A096337 A109757 A075189 this_sequence A056596 A026341 A026271
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 20 2004
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EXTENSIONS
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More terms from Ryan Propper (rpropper(AT)stanford.edu), Jul 25 2005
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