A010713 Period 2: repeat (4,8).

4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A176218.

Programs

Mathematica

Table[4 + 4 Mod[n, 2], {n, 0, 50}] (* Jinyuan Wang, Feb 26 2020 *)
LinearRecurrence[{0,1},{4,8},100] (* or *) PadRight[{},100,{4,8}] (* Harvey P. Dale, Aug 29 2023 *)

PARI

a(n)=4+n%2*4 \\ Charles R Greathouse IV, Dec 21 2011

Formula

a(n) = -2*(-1)^n + 6. - Paolo P. Lava, Oct 20 2006

From R. J. Mathar, Oct 20 2008: (Start)

a(n) = 4*A000034(n).

G.f.: 4(1+2x)/((1-x)(1+x)). (End)