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A021499 Decimal expansion of 1/495. 2

%I #28 Dec 27 2023 08:36:45

%S 0,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,

%T 2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,

%U 2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0,2,0

%N Decimal expansion of 1/495.

%C 0, then repeat 0, 2. [_Arkadiusz Wesolowski_, Jul 22 2011]

%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0,1).

%F a(n) = 1 + (-1)^n - 2*0^n = (-1 - A033999(n))*A062157(n). [_Arkadiusz Wesolowski_, Jul 22 2011]

%F G.f.: 2*x^2/(1-x^2). - _Bruno Berselli_, Jul 22 2011

%t Join[{0,0},RealDigits[1/495,10,120][[1]]] (* or *) PadRight[{0},120,{2,0}] (* _Harvey P. Dale_, Dec 13 2020 *)

%K nonn,cons

%O 0,3

%A _N. J. A. Sloane_.

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