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%I #8 Oct 26 2019 22:49:51
%S 26,164,1224,7664,51488,326456,2126376,13574046,87554326,560845908,
%T 3607790136,23158545126,148945375022,957564479960,6162874994108,
%U 39672627184498,255578754020002,1647166273816172,10622076015026288,68529892093271816,442357250742603624
%N a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A026568.
%K nonn
%O 3,1
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 26 2019
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