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

0,1

Comments

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

Links

Table of n, a(n) for n=0..65.

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

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

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 *)

Prog

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

Crossrefs

Sequence in context: A054048 A121512 A291527 * A151707 A059132 A059136

Adjacent sequences: A010712 A010713 A010714 * A010716 A010717 A010718

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved