|
| |
|
|
A185656
|
|
Final prime in first term of A019518 that is divisible by 7^n.
|
|
21
|
|
|
|
11, 601, 601, 601, 107839, 577937, 8341631, 8341631, 8341631, 8341631, 8341631, 166778433637, 4054944029077, 58520914386689
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
None of the numbers 2, 23, 235, and 2357 are divisible by 11, but 235711 is divisible by 7, so a(1)=11.
Not until the concatenation through 601 is such a number divisible by 7^2, so a(2)=601.
|
|
|
CROSSREFS
|
Cf. A183194 and immediately following entries.
|
|
|
KEYWORD
|
nonn,base,more
|
|
|
AUTHOR
|
|
|
|
EXTENSIONS
|
|
|
|
STATUS
|
approved
|
| |
|
|
