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A055196
Primitive numbers k that divide sigma(k)*phi(k).
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
OFFSET
1,1
COMMENTS
Terms from A011775 that are not a multiple of a previous term. - Michel Marcus, Dec 21 2013
LINKS
CROSSREFS
Cf. A011775.
Sequence in context: A247111 A071834 A295078 * A323752 A120624 A138873
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