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%I #9 Oct 27 2019 19:55:59
%S 1,6,71,561,4797,41462,359530,3124752,27213084,237432807,2075064759,
%T 18162872365,159198909233,1397157808149,12275908402205,
%U 107974903916703,950639462501475,8377212510209165,73882962176311701,652114141845864819,5759883148706408695
%N a(n) = Sum_{k=0..m-2} 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 2,2
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 27 2019
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