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A121556 Numbers such that sigma(n)^2 is divisible by UnitarySigma(n)*UnitaryPhi(n). +0
4
1, 2, 3, 6, 14, 15, 30, 35, 42, 70, 78, 105, 190, 210, 348, 357, 418, 570, 714, 910, 1045, 1144, 1254, 2090, 2296 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Cf. A121647, A078557, A020492.

Sequence in context: A134737 A030733 A122839 this_sequence A123041 A078557 A005537

Adjacent sequences: A121553 A121554 A121555 this_sequence A121557 A121558 A121559

KEYWORD

nonn

AUTHOR

Yasutoshi Kohmoto zbi74583(AT)boat.zero.ad.jp Sep 12 2006

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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