|
|
A225173
|
|
Number of numbers which require n iterations of the unitary totient function (A047994) to reach 1.
|
|
5
|
|
|
1, 1, 2, 4, 9, 21, 38, 82, 164, 261, 424, 749, 1097, 1721, 2592, 4351, 7319, 10725, 17013, 27773, 44767, 73914, 118990, 185059, 275055, 401059, 617679, 935331, 1379826, 2089569, 2962015, 3899417, 5202824
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|