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%I #7 Jun 13 2015 00:49:16
%S 2,19,172,1550,13951,125560,1130042,10170379,91533412,823800710,
%T 7414206391,66727857520,600550717682,5404956459139,48644608132252,
%U 437801473190270,3940213258712431
%N Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,1.
%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (9,0,1,-9).
%F G.f.: x*(2+x+x^2) / ( (x-1)*(9*x-1)*(1+x+x^2) ). - _R. J. Mathar_, Apr 30 2015
%K nonn,base,easy
%O 1,1
%A _Clark Kimberling_