VOOZH
about
URL: https://oeis.org/A116620
⇱ A116620 - OEIS
login
A116620
Positive integers n such that 13^n == 10 (mod n).
15
1, 3, 9, 74853, 1275039, 27181907, 31261887, 989255061, 4813809711, 3187842157567, 313768710194691
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,2
COMMENTS
No other terms below 10^15. -
Max Alekseyev
, Nov 06 2018
9909932321420413420533943 is a term. -
Max Alekseyev
, Jun 29 2011
LINKS
Table of n, a(n) for n=1..11.
MATHEMATICA
Join[{1, 3, 9}, Select[Range[2000000], PowerMod[13, #, #] == 10 &]] (*
Robert Price
, Apr 10 2020 *)
CROSSREFS
Solutions to 13^n == k (mod n):
A001022
(k=0),
A015963
(k=-1),
A116621
(k=1),
A116622
(k=2),
A116629
(k=3),
A116630
(k=4),
A116611
(k=5),
A116631
(k=6),
A116632
(k=7),
A295532
(k=8),
A116636
(k=9), this sequence (k=10),
A116638
(k=11),
A116639
(k=15).
Cf.
A116609
.
Sequence in context:
A060377
A255503
A027896
*
A057269
A113116
A137044
Adjacent sequences:
A116617
A116618
A116619
*
A116621
A116622
A116623
KEYWORD
more
,
nonn
AUTHOR
Zak Seidov
, Feb 19 2006
EXTENSIONS
More terms from
Ryan Propper
, Jun 12 2006
Terms 1,3,9 prepended and a(10)-a(11) added by
Max Alekseyev
, Jun 29 2011, Nov 06 2018
STATUS
approved
