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Search: id:A073163
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| 0, 3, 68, 259, 5500628, 1180641920, 19503263760, 46464766631, 863653341852
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OFFSET
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1,2
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FORMULA
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Values of s(n)=A046992(n) such that s(n)/n is integer.
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EXAMPLE
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Sum of first 17 values of Pi(n) equals: 0+1+2+2+3+3+4+4+4+4+5+5+6+6+6+6+7=68=4.17 In order to continue, see A073224.
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MATHEMATICA
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s = 0; Do[s = s + PrimePi[n]; If[ IntegerQ[s/n], Print[{n, s, s/n}]], {n, 1, 10^8}]
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CROSSREFS
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Cf. A046992, A000720, A073162, A073164 & A073224.
Sequence in context: A041983 A091872 A079320 this_sequence A124181 A046432 A166835
Adjacent sequences: A073160 A073161 A073162 this_sequence A073164 A073165 A073166
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jul 18 2002
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 20 2002
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