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 A010733 Period 2: repeat (8,10). 5

%I

%S 8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,

%T 10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,8,10,

%U 8,10,8,10,8,10,8,10,8,10,8,10

%N Period 2: repeat (8,10).

%C Continued fraction of 4+2*sqrt(105)/5. - R. J. Mathar, Nov 21 2011

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

%F a(n)=(-1)^(n+1)+9 a(n)=10*(n mod 2)+8*[(n+1) mod 2] - _Paolo P. Lava_, Oct 20 2006

%F G.f. ( -8-10*x ) / ( (x-1)*(1+x) ). - R. J. Mathar, Nov 21 2011

%t PadLeft[{8,10},70,{8,10}] (* _Harvey P. Dale_, Aug 09 2011 *)

%o (PARI) a(n)=n%2*2+8 \\ _Charles R Greathouse IV_, Jun 11 2015

%K nonn,easy

%O 0,1

%A _N. J. A. Sloane_.

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Last modified October 20 17:42 EDT 2019. Contains 328268 sequences. (Running on oeis4.)