|
Search: id:A065153
|
|
|
| A065153 |
|
Numbers n such that cototient[totient[n]] - totient[cototient[n]] = 0. |
|
+0
1
|
|
| 1, 3, 4, 8, 10, 14, 16, 18, 20, 28, 32, 33, 36, 40, 42, 54, 56, 64, 72, 75, 80, 84, 108, 110, 112, 114, 126, 128, 144, 160, 162, 168, 177, 198, 216, 220, 224, 228, 252, 256, 288, 320, 321, 324, 336, 342, 350, 375, 378, 396, 414, 432, 440, 448, 456, 486, 504, 512
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
EXAMPLE
|
m=108, Phi[108]=36, 108-Phi[108]=72=cototient[108], cototient[36]=36-12=24, totient[72]=24, so 108 is here.
|
|
MATHEMATICA
|
Flatten[Position[Table[co[eu[m]]-eu[co[m]], {m, 1, 1000}], 0]]
|
|
CROSSREFS
|
A000010[A051953(m)] = A051953[A000010(m)].
A000010, A051953.
Sequence in context: A114913 A111174 A075751 this_sequence A030497 A080085 A063414
Adjacent sequences: A065150 A065151 A065152 this_sequence A065154 A065155 A065156
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Labos E. (labos(AT)ana.sote.hu), Oct 19 2001
|
|
|
Search completed in 0.002 seconds
|
