A070346 a(n) = 3^n mod 37.

1, 3, 9, 27, 7, 21, 26, 4, 12, 36, 34, 28, 10, 30, 16, 11, 33, 25, 1, 3, 9, 27, 7, 21, 26, 4, 12, 36, 34, 28, 10, 30, 16, 11, 33, 25, 1, 3, 9, 27, 7, 21, 26, 4, 12, 36, 34, 28, 10, 30, 16, 11, 33, 25, 1, 3, 9, 27, 7, 21, 26, 4, 12, 36, 34, 28, 10, 30, 16, 11

Offset: 0

Author

N. J. A. Sloane, May 12 2002

Keywords

• nonn
• easy

Links

• G. C. Greubel, Table of n, a(n) for n = 0..1000
• Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 0, 0, 0, 0, 0, -1, 1).

Programs

Mathematica

Table[PowerMod[3,n,37],{n,0,70}] (* Harvey P. Dale, Jan 19 2011 *)

PARI

a(n)=lift(Mod(3,37)^n) \\ Charles R Greathouse IV, Mar 22 2016

Formula

a(n) = a(n-18). - G. C. Greubel, Mar 11 2016