|
| |
|
|
A356764
|
|
Semiprimes divisible by their indices in the sequence of semiprimes, divided by those indices.
|
|
2
|
|
|
|
4, 3, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 7, 7, 7, 7
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Except for a(1) = 4, all terms are prime.
|
|
|
LINKS
|
|
|
|
FORMULA
|
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn,hard,more
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
