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%I #8 Oct 27 2019 19:56:15
%S 1,42,420,3786,33648,297940,2633872,23265744,205446960,1814136746,
%T 16021697220,141535810130,1250763720312,11057433981126,97794407702052,
%U 865284559977150,7659315417653664,67827407480624862,600898634852988364,5325658497658529790
%N a(n) = Sum_{k=0..m-3} T(n,k) * T(n,k+2), where m=n for n=0,1,2,3; m=2n for n >= 4; and T is given by A026082.
%K nonn
%O 3,2
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 27 2019
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