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A067683 Phi(n)*sigma(n)+1 is prime. +0
1
1, 8, 9, 10, 12, 15, 20, 28, 30, 32, 35, 36, 42, 45, 50, 54, 58, 60, 70, 80, 92, 93, 95, 100, 110, 114, 122, 123, 124, 125, 130, 132, 142, 143, 145, 152, 155, 162, 165, 168, 169, 171, 172, 174, 175, 176, 178, 180, 183, 185, 186, 195, 198, 200, 204, 209, 212, 216 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Sequence in context: A068019 A054011 A114842 this_sequence A072381 A046415 A091417

Adjacent sequences: A067680 A067681 A067682 this_sequence A067684 A067685 A067686

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 04 2002

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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