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A067242 Numbers n such that sigma(n+1)+sigma(n-1)=5*phi(n). 0
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; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..29.

CROSSREFS

Sequence in context: A076592 A004844 A037324 * A028354 A028355 A074920

Adjacent sequences:  A067239 A067240 A067241 * A067243 A067244 A067245

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Feb 20 2002

STATUS

approved

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Last modified May 28 01:48 EDT 2020. Contains 334671 sequences. (Running on oeis4.)