OFFSET
1,2
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..100
MATHEMATICA
Select[Range[1000000], IntegerQ[(PowerMod[5, #, # ]+5)/# ]&] (* Alexander Adamchuk *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected by Alexander Adamchuk, Nov 04 2006
STATUS
approved