A010696 Periodic sequence: Repeat 2,6.

2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2, 6, 2

Offset

0,1

Comments

Original name: Period 2.

Also continued fraction expansion of 1+(2/3)*sqrt(3). - Bruno Berselli, Sep 22 2011

Links

Table of n, a(n) for n=0..80.

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

Formula

G.f.: ( -2-6*x ) / ( (x-1)*(1+x) ). - R. J. Mathar, Jul 07 2011

a(n) = a(-n) = 2*A010684(n) = A131800(2n+1) = A010123(2n+2). - Bruno Berselli, Sep 22 2011

Mathematica

PadRight[{}, 100, {2, 6}] (* Paolo Xausa, Feb 22 2024 *)

Crossrefs

Cf. A174114. [From Reinhard Zumkeller, Mar 08 2010]

Sequence in context: A342982 A128045 A011325 * A021796 A127356 A232273

Adjacent sequences: A010693 A010694 A010695 * A010697 A010698 A010699

Keyword

nonn,easy

Author

N. J. A. Sloane.

Extensions

Definition rewritten by Bruno Berselli, Sep 22 2011

Status

approved