A037722 - OEIS

A037722

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

%I #19 Dec 14 2023 05:30:17

%S 2,20,201,2013,20132,201320,2013201,20132013,201320132,2013201320,

%T 20132013201,201320132013,2013201320132,20132013201320,

%U 201320132013201,2013201320132013

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

%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*(2-2*x+3*x^2) / ( (x-1)*(10*x-1)*(x^2+1) ). - _R. J. Mathar_, Nov 21 2011

%o (PARI) Vec(x*(2-2*x+3*x^2)/((x-1)*(10*x-1)*(x^2+1)) + O(x^25)) \\ _Jinyuan Wang_, Apr 14 2020

%K nonn,base,easy

%O 1,1

%A _Clark Kimberling_