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Search: id:A066986
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A066986 Integers of the form prod(i=1,n, sigma(i))/prod(i=1,n,phi(i))=A001088(n)/A066780(n). +0
1
1, 3, 6, 21, 189, 252, 945, 361179, 1083537 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A032098 A019053 A019054 this_sequence A096662 A054297 A079514

Adjacent sequences: A066983 A066984 A066985 this_sequence A066987 A066988 A066989

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 27 2002

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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