A001218 a(n) = 3^n mod 100.

1, 3, 9, 27, 81, 43, 29, 87, 61, 83, 49, 47, 41, 23, 69, 7, 21, 63, 89, 67, 1, 3, 9, 27, 81, 43, 29, 87, 61, 83, 49, 47, 41, 23, 69, 7, 21, 63, 89, 67, 1, 3, 9, 27, 81, 43, 29, 87, 61, 83, 49, 47, 41, 23, 69, 7, 21, 63, 89, 67

Offset

0,2

Comments

Period is 20.

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for sequences related to final digits of numbers

Mathematica

PowerMod[3, Range[0, 60], 100] (* Vincenzo Librandi, Aug 15 2016

Prog

(PARI) a(n)=lift(Mod(3, 100)^n) \\ Charles R Greathouse IV, Dec 27 2012
(Magma) [Modexp(3, n, 100): n in [0..100]]; // Vincenzo Librandi, Aug 15 2016

Crossrefs

Cf. A001148, A216096, A216097. - Zak Seidov, Jul 27 2014

Sequence in context: A036160 A271352 A329023 * A036158 A036136 A271350

Adjacent sequences: A001215 A001216 A001217 * A001219 A001220 A001221

Keyword

nonn,easy

Author

N. J. A. Sloane

Extensions

Definition corrected by Zak Seidov, Jul 27 2014

Status

approved