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Search: id:A067242
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A067242 Numbers n such that sigma(n+1)+sigma(n-1)=5*phi(n). +0
1
2, 3, 4, 32, 58, 133, 221, 377, 407, 472, 1241, 1978, 7232, 13181, 13952, 15323, 15409, 17362, 22328, 32048, 44215, 46192, 46498, 46975, 49228, 73169, 74498, 128723, 177305 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Sequence in context: A076592 A004844 A037324 this_sequence A028354 A028355 A074920

Adjacent sequences: A067239 A067240 A067241 this_sequence A067243 A067244 A067245

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 20 2002

page 1

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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