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A073162 n is such that partial sum of pi(k) from 1 to n is divisible by n. 2
1, 3, 17, 37, 9107, 156335, 679083, 1068131, 4883039, 101691357 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
a(11) > 10^12. - Donovan Johnson, Mar 19 2011
a(11) > 10^13. - Lucas A. Brown, Oct 05 2020
LINKS
FORMULA
Solutions to Mod[A046992(x), x]=0
EXAMPLE
a(3) = 17 because 0+1+2+2+3+3+4+4+4+4+5+5+6+6+6+6+7 = 68 = 4*17.
MATHEMATICA
s = 0; Do[s = s + PrimePi[n]; If[ IntegerQ[s/n], Print[{n, s, s/n}]], {n, 1, 10^8}]
CROSSREFS
Sequence in context: A106896 A097938 A354475 * A146186 A179783 A196781
KEYWORD
nonn,more
AUTHOR
Labos Elemer, Jul 18 2002
EXTENSIONS
Edited and extended by Robert G. Wilson v, Jul 20 2002
a(10) from Donovan Johnson, Dec 15 2009
STATUS
approved

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Last modified April 18 15:35 EDT 2024. Contains 371780 sequences. (Running on oeis4.)