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A055196 Numbers n such that n | sigma(n)*phi(n) and n is primitive. 1
6, 28, 40, 117, 135, 496, 775, 891, 1701, 2176, 5632, 6875, 8128, 18688, 23552, 26624, 44375, 88723, 89667, 91136, 274625, 352256, 557375, 628849, 722701, 796797, 1071875, 1200663, 1288625, 1358127, 1512875, 2246503, 2473984, 2490368, 2896363, 2909375 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms from A011775 that are not a multiple of a previous term. - Michel Marcus, Dec 21 2013

LINKS

Michel Marcus, Table of n, a(n) for n = 1..68

CROSSREFS

Cf. A011775.

Sequence in context: A247111 A071834 A295078 * A323752 A120624 A138873

Adjacent sequences:  A055193 A055194 A055195 * A055197 A055198 A055199

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Jun 30 2000

EXTENSIONS

Extended using A011775 b-file by Michel Marcus, Dec 21 2013

STATUS

approved

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Last modified October 18 01:04 EDT 2019. Contains 328135 sequences. (Running on oeis4.)