A010696 - OEIS

%I #32 Feb 22 2024 10:44:04

%S 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,

%T 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,

%U 2,6,2,6,2,6,2,6,2,6,2,6,2

%N Periodic sequence: Repeat 2,6.

%C Original name: Period 2.

%C Also continued fraction expansion of 1+(2/3)*sqrt(3). - _Bruno Berselli_, Sep 22 2011

%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0,1)

%F G.f.: ( -2-6*x ) / ( (x-1)*(1+x) ). - _R. J. Mathar_, Jul 07 2011

%F a(n) = a(-n) = 2*A010684(n) = A131800(2n+1) = A010123(2n+2). - _Bruno Berselli_, Sep 22 2011

%t PadRight[{}, 100, {2, 6}] (* _Paolo Xausa_, Feb 22 2024 *)

%Y Cf. A174114. [From _Reinhard Zumkeller_, Mar 08 2010]

%K nonn,easy

%O 0,1

%A _N. J. A. Sloane_.

%E Definition rewritten by _Bruno Berselli_, Sep 22 2011