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A037771 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,2,1. 0

%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(n-1)+(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) / ( (x-1)*(10*x-1)*(1+x)*(x^2+1) ). - _R. J. Mathar_, Aug 04 2013

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified May 22 21:17 EDT 2019. Contains 323504 sequences. (Running on oeis4.)