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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
OFFSET
1,2
COMMENTS
All terms are positive.
FORMULA
A058277(n) = A143421(n) + a(n).
CROSSREFS
Cf. A207335.
Sequence in context: A183045 A060847 A079528 * A071438 A328169 A353951
KEYWORD
nonn
AUTHOR
T. D. Noe, Aug 14 2008
STATUS
approved