|
| |
| |
| |
|
|
|
OFFSET
| 1,3
|
|
|
FORMULA
| Integer values of s(n)=A046992(n)/n.
|
|
|
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, Sum(17)/17=4=a(3).
|
|
|
MATHEMATICA
| s = 0; Do[s = s + PrimePi[n]; If[ IntegerQ[s/n], Print[{n, s, s/n}]], {n, 1, 10^8}]
|
|
|
CROSSREFS
| Cf. A046992, A000720, A073162, A073163 & A073224.
Sequence in context: A136276 A024054 A126577 * A134900 A028583 A070263
Adjacent sequences: A073161 A073162 A073163 * A073165 A073166 A073167
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Jul 18 2002
|
|
|
EXTENSIONS
| Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 20 2002
a(10) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 15 2009
|
| |
|
|
