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%I #6 Mar 30 2012 18:59:06
%S 1,1,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,
%T 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%U 0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N Characteristic sequence for the Pell numbers.
%H <a href="/index/Ch#char_fns">Index entries for characteristic functions</a>
%F G.f. : sum{k>=0, x^A000129(k)}.
%K easy,nonn
%O 0,1
%A _Paul Barry_, Apr 01 2005
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