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%I #8 Oct 26 2019 15:34:00
%S 1,10,68,402,2258,12072,64963,338824,1817063,9467940,51258781,
%T 269085042,1475551064,7822940886,43422818989,232480179882,
%U 1303561020575,7040175844640,39786449049369,216469879238194,1230485470688864,6736096483008440,38451562317699992,211571284685596944
%N a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026769.
%K nonn
%O 3,2
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 26 2019
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