OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
MATHEMATICA
PowerMod[Range[0, 90], 5, 21] (* Harvey P. Dale, Sep 19 2013 *)
PROG
(Sage) [power_mod(n, 5, 21)for n in range(0, 82)] # - Zerinvary Lajos, Nov 04 2009
(Magma) [n^5 mod 21: n in [0..100 ]]; // Vincenzo Librandi, Sep 19 2013
(PARI) a(n)=n^5%21 \\ Charles R Greathouse IV, Apr 06 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 13 2002
STATUS
approved