OFFSET
1,2
LINKS
Zizheng Fang, Table of n, a(n) for n = 1..10000
Zizheng Fang, Python program to generate A177807
MATHEMATICA
{1}~Join~Select[Range[420], PowerMod[17, #, #] == 1 &] (* Giovanni Resta, Jan 30 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, May 17 2010
STATUS
approved