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Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,2,0,1.
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%I #20 Dec 14 2023 05:28:30

%S 3,32,320,3201,32013,320132,3201320,32013201,320132013,3201320132,

%T 32013201320,320132013201,3201320132013,32013201320132,

%U 320132013201320,3201320132013201

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

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (11,-11,11,-10).

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

%t Table[FromDigits[PadRight[{},n,{3,2,0,1}]],{n,20}] (* or *) LinearRecurrence[ {11,-11,11,-10},{3,32,320,3201},20] (* _Harvey P. Dale_, Jan 18 2014 *)

%K nonn,base,easy

%O 1,1

%A _Clark Kimberling_