A167420 2^n mod 14.

1, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8, 2, 4, 8

Offset

0,2

Links

Table of n, a(n) for n=0..99.

Index entries for linear recurrences with constant coefficients, signature (0,0,1).

Formula

G.f.: 1 + -2*x*(1+2*x+4*x^2) / ( (x-1)*(1+x+x^2) ). - R. J. Mathar, Jun 18 2019

Mathematica

PowerMod[2, Range[0, 100], 14] (* Harvey P. Dale, Jul 25 2011 *)

Prog

(Sage) [power_mod(2, n, 14)for n in range(0, 100)] #
(PARI) a(n)=lift(Mod(2, 14)^n) \\ Charles R Greathouse IV, Mar 22 2016

Crossrefs

Sequence in context: A362985 A175131 A033921 * A195711 A200610 A076232

Adjacent sequences: A167417 A167418 A167419 * A167421 A167422 A167423

Keyword

nonn,easy

Author

Zerinvary Lajos, Nov 03 2009

Status

approved