A010708 Period 2: repeat [3,10].

3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10, 3, 10

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Comments

Continued fraction expansion of A176109.

Links

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

Crossrefs

Cf. A176109.

Programs

Mathematica

PadRight[{},100,{3,10}] (* Harvey P. Dale, Oct 31 2015 *)

PARI

a(n)=3+n%2*7 \\ Charles R Greathouse IV, Dec 21 2011

Formula

a(n) = -7/2*(-1)^n + 13/2. - Paolo P. Lava, Oct 20 2006

G.f. (3+10x)/((1-x)*(1+x)). - R. J. Mathar, Nov 21 2011

a(n+2) = a(n). - Wesley Ivan Hurt, May 26 2024