A037771 - OEIS

%I #18 Dec 14 2023 05:30:49

%S 3,30,302,3021,30213,302130,3021302,30213021,302130213,3021302130,

%T 30213021302,302130213021,3021302130213,30213021302130,

%U 302130213021302,3021302130213021

%N Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,2,1.

%H <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (10,0,0,1,-10).

%F G.f.: x*(3+2*x^2+x^3) / ( (x-1)*(10*x-1)*(1+x)*(x^2+1) ). - _R. J. Mathar_, Aug 04 2013

%o (PARI) Vec(x*(3+2*x^2+x^3)/((x-1)*(10*x-1)*(1+x)*(x^2+1)) + O(x^25)) \\ _Jinyuan Wang_, Apr 14 2020

%K nonn,base,easy

%O 1,1

%A _Clark Kimberling_