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A073128
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Integer quotients arising in A063986.
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1
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0, 1, 1, 5, 5, 49, 118, 121, 2406, 2698, 4182, 4946, 153627, 3087192, 8203485, 38394376, 487844934, 2822741576, 4140154385, 4397137572, 8583966231
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OFFSET
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1,4
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LINKS
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Table of n, a(n) for n=1..21.
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FORMULA
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a(n)=Sum[cototient[j], j=1..A063986(n)]/A063986(n)
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EXAMPLE
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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!
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CROSSREFS
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Cf. A051953, A000010, A002088, A048920, A000217, A050226, A063986.
Sequence in context: A178693 A065238 A196388 * A189749 A009390 A009334
Adjacent sequences: A073125 A073126 A073127 * A073129 A073130 A073131
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KEYWORD
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more,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jul 16 2002
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EXTENSIONS
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Changed A063896 to A063986 and a(16)-a(21) from Donovan Johnson, May 11 2010
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STATUS
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approved
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