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A033857
Numbers n such that j(n)*phi(n) = usigma(n), where j(n) =
A033831
, usigma(n) = sum of unitary divisors of n (
A034448
).
0
35, 44, 56, 105, 198, 418, 1254
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OFFSET
1,1
COMMENTS
If it exists, a(8) > 10^9. -
Sean A. Irvine
, Jul 20 2020
LINKS
Table of n, a(n) for n=1..7.
CROSSREFS
Cf.
A000010
(phi),
A034448
(usigma),
A033831
.
Sequence in context:
A298156
A167326
A141638
*
A110264
A034105
A034115
Adjacent sequences:
A033854
A033855
A033856
*
A033858
A033859
A033860
KEYWORD
nonn
,
more
AUTHOR
Naohiro Nomoto
STATUS
approved
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Last modified June 5 20:14 EDT 2024. Contains 373110 sequences. (Running on oeis4.)