|
| |
|
|
A067192
|
|
Composite n such that sigma(n)==2 (mod phi(n)).
|
|
0
| | |
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| 3*10^9 < a(11) <= 274877120512. a(12) <= 4398043365376. a(13) <= 70368731594752. a(14) <= 72057593635274752. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 14 2009]
|
|
|
CROSSREFS
| Sequence in context: A115045 A205879 A188896 * A030004 A174183 A131726
Adjacent sequences: A067189 A067190 A067191 * A067193 A067194 A067195
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 19 2002
|
|
|
EXTENSIONS
| a(8)-a(10) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 14 2009
|
| |
|
|
