OFFSET
1,2
MATHEMATICA
Select[ Range[ 10^4 ], Mod[ PowerMod[ 9, #, # ] + PowerMod[ 8, #, # ] + PowerMod[ 7, #, # ] + PowerMod[ 6, #, # ] + PowerMod[ 5, #, # ] + PowerMod[ 4, #, # ] + PowerMod[ 3, #, # ], # ] == 0 & ]
Select[Range[8000], Divisible[Total[Range[3, 9]^#], #]&] (* Harvey P. Dale, Apr 03 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Sep 22 2000
STATUS
approved