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%I
%S 1,4,15,52,195,676,2555,8976,34098,121448,463067,1669340,6384287,
%T 23251620,89157557,327523680,1258803182,4658150520,17940605163,
%U 66803546472,257777882894,965023761064,3730202020650,14029655954272,54315578806820,205120107930192
%N a(n) = Sum_{k=0..m-1} T(n,k) * T(n,k+1), where m=n for n=0,1 and m=floor((n+3)/2) for n >= 2, and T given by A026022.
%K nonn
%O 1,2
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 26 2019
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