|
| |
|
|
A074469
|
|
Subscript m such that SigmaComposite-Harmonic series cd[m]=Sum[1/A000203[A002808(k)],{k,1,m}]>=n.
|
|
1
| |
|
|
32, 301, 2123, 13172, 76105, 420007, 2245009, 11719362, 60071831, 303487314, 1515211979
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
MATHEMATICA
| c[x_] := FixedPoint[x+PrimePi[ # ]+1&, x] {s=0, s1=0}; Do[s=s+(1/DivisorSigma[1, c[n]]); If[Greater[Floor[s], s1], s1=Floor[s]; Print[{n, Floor[s]}]], {n, 1, 1000000}]
|
|
|
CROSSREFS
| Cf. A004080, A002387, A002808, A000203, A073255, A046024, A074631, A074633, A074468, A074470.
Sequence in context: A009526 A197523 A060158 * A159654 A061958 A050279
Adjacent sequences: A074466 A074467 A074468 * A074470 A074471 A074472
|
|
|
KEYWORD
| hard,more,nonn
|
|
|
AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Sep 05 2002
|
|
|
EXTENSIONS
| a(6)-a(11) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Aug 22 2011
|
| |
|
|
