A010679 Period 2: repeat (0,8).

0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0, 8, 0

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A010700: 3^(1-(-1)^n) + 1.

Programs

Magma

&cat [[0,8]^^40]; // Bruno Berselli, Dec 29 2015

Mathematica

PadRight[{},120,{0,8}] (* Harvey P. Dale, Dec 21 2015 *)

PARI

a(n)=n%2*8 \\ Charles R Greathouse IV, Jul 26 2016

Formula

a(n) = 4*(1-(-1)^n) = 8*(n mod 2). - Paolo P. Lava, Oct 20 2006

G.f.: 8*x/((1-x)*(1+x)). - R. J. Mathar, Nov 21 2011

a(n) = 3^(1-(-1)^n) - 1. - Bruno Berselli, Dec 29 2015