A010677 Period 2: repeat (0,6).

0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0, 6, 0

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

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

Programs

Mathematica

Table[6 Mod[n, 2], {n, 0, 50}] (* Jinyuan Wang, Feb 26 2020 *)
PadRight[{},100,{0,6}] (* Harvey P. Dale, Aug 10 2023 *)

PARI

a(n)=n%2*6 \\ Charles R Greathouse IV, Jul 13 2016

Formula

a(n) = 3*[1-(-1)^n] = 6*(n mod 2). - Paolo P. Lava, Oct 20 2006

G.f. 6x/((1-x)(1+x)). - R. J. Mathar, Nov 21 2011