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%I #5 Mar 30 2012 18:56:53
%S 1,2,3,6,12,21,42,84,155,310,620,1176,2352,4704,9071,18142,36284,
%T 70717,141434,282868,555268,1110536,2221072,4381656,8763312,17526624,
%U 34697879,69395758,138791516,275467455,550934910,1101869820,2191008499
%N Sum{T(i,n-i): i=0,1,...,n}, array T as in A047089.
%K nonn
%O 0,2
%A _Clark Kimberling_
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