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A067612 Numbers n such that sigma(n)=3*phi(sigma(n)). 0
5, 6, 10, 11, 14, 15, 17, 22, 23, 30, 33, 34, 35, 42, 46, 47, 51, 53, 55, 62, 66, 69, 70, 71, 77, 85, 94, 102, 105, 106, 107, 110, 115, 119, 138, 141, 142, 154, 155, 159, 161, 165, 170, 186, 187, 191, 210, 213, 214, 230, 231, 235, 238, 253, 254, 255, 265, 282, 310 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

CROSSREFS

Sequence in context: A163903 A173901 A074627 * A064957 A008851 A079259

Adjacent sequences:  A067609 A067610 A067611 * A067613 A067614 A067615

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 22 2002

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Last modified February 17 02:48 EST 2012. Contains 205978 sequences.