|
| |
|
|
A077096
|
|
Starting iteration of Phi[]*(Sigma[]-Phi[]) function at these initial values leads to the fixed point 8064.
|
|
0
| |
|
|
7530, 8064, 9678, 9828, 9990, 10002, 10290, 10464, 11000, 11004, 11172, 11350, 11510, 11572, 11814, 11930, 12006, 12192, 12348, 12472, 12636, 12654, 12726, 12750, 12772, 12972, 13332, 13372, 13420, 13440, 13626, 13648, 13656, 13695
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
EXAMPLE
| n=41354: FixedPointList={41354,13440,15232,8064},end=8064.
|
|
|
MATHEMATICA
| f[x_] := EulerPhi[DivisorSigma[1, x]-EulerPhi[x]] Do[s=NestList[f, n, 100]; s1=Part[s, 99]; s2=Part[s, 100]; If[Equal[s1, s2]&&Equal[s1, 8064], Print[n]], {n, 1, 1000000}]
|
|
|
CROSSREFS
| Cf. A077090-A077100.
Sequence in context: A090742 A186938 A185749 * A031137 A157322 A172443
Adjacent sequences: A077093 A077094 A077095 * A077097 A077098 A077099
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Oct 31 2002
|
| |
|
|
