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A021499 Decimal expansion of 1/495. 0

%I

%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]

%F a(n) = 1 + (-1)^n - 2*(C(2*n,n) mod 2), with n>=0. - Paolo P. Lava, Nov 18 2009

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

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

%K nonn,cons

%O 0,3

%A _N. J. A. Sloane_.

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Last modified May 22 01:57 EDT 2013. Contains 225510 sequences.