|
|
A045578
|
|
Numbers k that divide 5^k + 2^k.
|
|
1
|
|
|
1, 7, 49, 343, 2401, 11179, 16807, 24059, 78253, 117649, 168413, 547771, 823543, 1178891, 3834397, 5764801, 8252237, 11812969, 17852863, 23649997, 26840779, 34591207, 38422223, 40353607, 57765659, 82690783, 94527811, 124970041, 165549979, 178539809, 187885453
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
MATHEMATICA
|
Select[Range[200000], Divisible[PowerMod[2, #, #] + PowerMod[5, #, #], #] &] (* Amiram Eldar, Oct 23 2021 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|