A010715 Period 2: repeat (4,10).

4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10, 4, 10

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Comments

Continued fraction of 2 + sqrt(110)/5 = A176220. - R. J. Mathar, Nov 21 2011

Links

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

Programs

Mathematica

Table[4 + 6 Mod[n, 2], {n, 0, 50}] (* Jinyuan Wang, Feb 26 2020 *)
PadRight[{},80,{4,10}] (* Harvey P. Dale, Jul 12 2021 *)

PARI

a(n)=n%2*6+4 \\ Charles R Greathouse IV, Jul 13 2016

Formula

a(n) = -3*(-1)^n + 7. - Paolo P. Lava, Oct 20 2006

G.f. ( -4-10*x ) / ((x-1)*(1+x)). - R. J. Mathar, Nov 21 2011