A001311 Final 2 digits of 6^n.

1, 6, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96, 76, 56, 36, 16, 96

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Comments

The period is 5.

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..1000
• Index entries for sequences related to final digits of numbers
• INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 202

Programs

Magma

[Modexp(6, n, 100): n in [0..110]]; // Vincenzo Librandi, Aug 15 2016

Mathematica

PowerMod[6, Range[0, 60], 100] (* Vincenzo Librandi, Aug 15 2016 *)

PARI

a(n)=lift(Mod(6,100)^n) \\ Charles R Greathouse IV, Dec 28 2012