OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..2000
MATHEMATICA
Select[Range[30000], Divisible[PowerMod[2, #, #] + PowerMod[7, #, #], #] &] (* Amiram Eldar, Oct 23 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved