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A143422
Number of even numbers k such that phi(k) = n, where n runs through the values (
A002202
) taken by phi.
3
1, 2, 3, 2, 4, 1, 4, 5, 2, 3, 1, 7, 1, 1, 6, 5, 6, 2, 2, 1, 9, 1, 1, 2, 1, 5, 7, 1, 1, 11, 1, 8, 1, 4, 4, 2, 13, 2, 1, 2, 1, 5, 1, 4, 2, 11, 1, 8, 1, 4, 1, 1, 2, 16, 1, 1, 4, 10, 2, 2, 1, 8, 1, 6, 1, 5, 3, 1, 17, 1, 1, 5, 2, 3, 1, 2, 12, 3, 1, 6, 1, 1, 4, 1, 21, 1, 5, 9, 2, 1, 7, 1, 1, 3, 5, 5, 1
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OFFSET
1,2
COMMENTS
All terms are positive.
LINKS
T. D. Noe,
Table of n, a(n) for n=1..10000
FORMULA
A058277
(n) =
A143421
(n) + a(n).
CROSSREFS
Cf.
A207335
.
Sequence in context:
A183045
A060847
A079528
*
A071438
A328169
A353951
Adjacent sequences:
A143419
A143420
A143421
*
A143423
A143424
A143425
KEYWORD
nonn
AUTHOR
T. D. Noe
, Aug 14 2008
STATUS
approved