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 A073128 Integer quotients arising in A063986. 1
 0, 1, 1, 5, 5, 49, 118, 121, 2406, 2698, 4182, 4946, 153627, 3087192, 8203485, 38394376, 487844934, 2822741576, 4140154385, 4397137572, 8583966231 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS Table of n, a(n) for n=1..21. FORMULA a(n)=Sum[cototient[j], j=1..A063986(n)]/A063986(n) EXAMPLE n=15, A063986(15)=41846733, sum of first 41846733 cototients is s=343289046464505, a(15)=s/41846733. Only in knowledge of either the quotients or of partial sums of cototients is it possible to continue A063986 without recomputing previous terms! CROSSREFS Cf. A051953, A000010, A002088, A048920, A000217, A050226, A063986. Sequence in context: A178693 A065238 A196388 * A189749 A368894 A009390 Adjacent sequences: A073125 A073126 A073127 * A073129 A073130 A073131 KEYWORD more,nonn AUTHOR Labos Elemer, Jul 16 2002 EXTENSIONS Changed A063896 to A063986 and a(16)-a(21) from Donovan Johnson, May 11 2010 STATUS approved

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Last modified April 18 13:50 EDT 2024. Contains 371780 sequences. (Running on oeis4.)