OFFSET
1,6
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Table[Mod[(8^n-1)/7, n], {n, 100}] (* Harvey P. Dale, Jul 30 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 18 2004
STATUS
approved