%I
%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 a(n)=10*a(n1)+(1/4)*{2*(n mod 4)[(n+1) mod 4]+4*[(n+2) mod 4][(n+3) mod 4]}, with a(0)=0 [From _Paolo P. Lava_, Jul 30 2009]
%F G.f. x*(3+2*x^2+x^3) / ( (x1)*(10*x1)*(1+x)*(x^2+1) ).  _R. J. Mathar_, Aug 04 2013
%K nonn,base
%O 1,1
%A _Clark Kimberling_
