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A073163 Partial sums of Pi(k) arising in A073162. 2
0, 3, 68, 259, 5500628, 1180641920, 19503263760, 46464766631, 863653341852, 306757978180563 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
Values of s(n) = A046992(n) such that s(n)/n is integer.
EXAMPLE
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. To continue, see A073224.
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: A091872 A079320 A283882 * A324082 A279491 A264700
KEYWORD
nonn
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 February 28 00:18 EST 2024. Contains 370379 sequences. (Running on oeis4.)