|
| |
|
|
A049116
|
|
Repeatedly apply Euler phi to n; a(n) = highest power of 2 that is seen.
|
|
2
| |
|
|
1, 2, 2, 4, 4, 2, 2, 8, 2, 4, 4, 4, 4, 2, 8, 16, 16, 2, 2, 8, 4, 4, 4, 8, 8, 4, 2, 4, 4, 8, 8, 32, 8, 16, 8, 4, 4, 2, 8, 16, 16, 4, 4, 8, 8, 4, 4, 16, 4, 8, 32, 8, 8, 2, 16, 8, 4, 4, 4, 16, 16, 8, 4, 64, 16, 8, 8, 32, 8, 8, 8, 8, 8, 4, 16, 4, 16, 8, 8, 32, 2, 16, 16, 8, 64, 4, 8, 16, 16, 8, 8, 8
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
EXAMPLE
| If n is a power of 2, then it is of largest exponent. If n=2400, then its phi-sequence is {2400,640,256,128,64,32,16,8,4,2,1}. The value of first power of 2 is 256. Thus a(2400)=256.
|
|
|
CROSSREFS
| A000010.
Sequence in context: A071928 A165207 A130501 * A065176 A060267 A048244
Adjacent sequences: A049113 A049114 A049115 * A049117 A049118 A049119
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Labos E. (labos(AT)ana.sote.hu)
|
| |
|
|
