|
|
A106132
|
|
Numbers k such that the k-th semiprime == 7 (mod k).
|
|
1
|
|
|
1, 7, 9, 66, 6675, 6918, 613374, 613412, 613418, 613422, 613428, 613434, 613510, 613512, 613514, 613520, 613542, 58155531, 58155569, 58155572, 6384425518, 6384425556, 819217006165, 819217006175, 819217006199, 819217006203, 819217006227, 819217006665, 819217006869
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
a(3)=9 is a term because the 9th semiprime (i.e., 25) == 7 (mod 9).
|
|
CROSSREFS
|
|
|
KEYWORD
|
hard,nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|