|
| |
|
|
A099103
|
|
Natural numbers n with more digits than Euler totient phi(n)
|
|
1
| |
|
|
10, 12, 14, 15, 16, 18, 20, 24, 30, 100, 102, 104, 105, 106, 108, 110, 111, 112, 114, 115, 116, 117, 118, 119, 120, 122, 123, 124, 126, 128, 129, 130, 132, 134, 135, 136, 138, 140, 141, 142, 144, 146, 147, 148, 150, 152, 153, 154, 156, 158, 160, 162, 164, 165
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| This sequence is an indirect comment on the referenced comment of R. K. Guy concerning the occurrence of 301-digit numbers.
|
|
|
LINKS
| Walter Nissen, Home Page (listed in lieu of email address)
R. K. Guy, Re: Odd Perfect Numbers.
|
|
|
EXAMPLE
| 10 is in the sequence because 2, the number of digits in 10, is more than 1, the number of digits in 4 = phi ( 10 ).
|
|
|
MATHEMATICA
| Select[Range[200], IntegerLength[#]>IntegerLength[EulerPhi[#]]&] [from Harvey P. Dale, Dec. 14, 2010]
|
|
|
CROSSREFS
| Cf. A000010, A099102.
Sequence in context: A161598 A122426 A141322 * A094879 A206286 A116023
Adjacent sequences: A099100 A099101 A099102 * A099104 A099105 A099106
|
|
|
KEYWORD
| base,easy,nonn
|
|
|
AUTHOR
| Walter Nissen Sep 25 2004
|
| |
|
|
