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Search: id:A114079
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A114079 sigma(n)*phi(n)*n is a square. +0
1
1, 6, 40, 84, 162, 672, 2268, 2480, 3159, 18144, 58752, 80262, 91000, 126360, 140800, 170688, 358668, 634725, 718848, 1063300, 1089270, 1255338, 1701000 (list; graph; listen)
OFFSET

1,2
EXAMPLE

sigma(84)*phi(84)*84 = 451584 = 672^2.

CROSSREFS

Adjacent sequences: A114076 A114077 A114078 this_sequence A114080 A114081 A114082

Sequence in context: A108937 A045565 A110424 this_sequence A002595 A089207 A027777

KEYWORD

nonn

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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