%I #11 Jun 23 2022 12:04:10
%S 3,20,120,723,4340,26040,156243,937460,5624760,33748563,202491380,
%T 1214948280,7289689683,43738138100,262428828600,1574572971603,
%U 9447437829620,56684626977720,340107761866323,2040646571197940
%N Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 3,2,0.
%H Harvey P. Dale, <a href="/A037669/b037669.txt">Table of n, a(n) for n = 1..1000</a>
%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (6,0,1,-6).
%F G.f.: x*(3+2*x) / ( (x-1)*(6*x-1)*(1+x+x^2) ). - _R. J. Mathar_, Apr 30 2015
%t Table[FromDigits[PadRight[{},n,{3,2,0}],6],{n,20}] (* _Harvey P. Dale_, Jun 23 2022 *)
%K nonn,base,easy
%O 1,1
%A _Clark Kimberling_