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A122839 Numbers such that Sigma(m)*UnitarySigma(m)= k*UnitaryPhi(m)^2, for some integer k. 1
1, 2, 3, 6, 14, 15, 30, 35, 42, 60, 70, 78, 105, 190, 210, 312, 357, 418, 570, 714, 910, 1045, 1254, 1428, 2090, 2730, 3135, 3640, 4522, 4674, 5278, 6270, 10659, 10920, 12441, 13566, 14630, 15834, 16770, 18696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Terms which are squarefree appear on A121556.

LINKS

Table of n, a(n) for n=1..40.

CROSSREFS

Cf. A034448, A047994, A121556.

Sequence in context: A146000 A134737 A030733 * A258077 A121556 A123041

Adjacent sequences:  A122836 A122837 A122838 * A122840 A122841 A122842

KEYWORD

nonn

AUTHOR

Yasutoshi Kohmoto, Oct 23 2006

STATUS

approved

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Last modified April 27 01:03 EDT 2018. Contains 303149 sequences. (Running on oeis4.)