OFFSET
0,2
COMMENTS
Period is 10, i.e., a(n+10) = a(n). - Martin Renner, Jun 11 2020
LINKS
FORMULA
a(n) = 9^n mod 100. - Martin Renner, Jun 11 2020
MAPLE
seq(9^n mod 100, n=0..80); # Martin Renner, Jun 11 2020
MATHEMATICA
Flatten[Prepend[FromDigits[Take[IntegerDigits[#], -2]]&/@(9^Range[2, 60]), {1, 9}]] (* Harvey P. Dale, Jan 22 2011 *)
PowerMod[9, Range[0, 80], 100] (* Vincenzo Librandi, Aug 16 2016 *)
PROG
(Magma) [Modexp(9, n, 100): n in [0..110]]; // Vincenzo Librandi, Aug 16 2016
(PARI) a(n) = lift(Mod(9, 100)^n); \\ Michel Marcus, Aug 16 2016
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved