%I #9 Oct 27 2019 11:14:09
%S 2,16,123,956,7519,59742,478869,3868104,31458348,257396972,2117494621,
%T 17504651148,145341743066,1211584784416,10136488835157,85085339305360,
%U 716366098507550,6048143934750432,51194316337883625,434360166677159652,3693446859517381827
%N a(n) = Sum_{k=0..n+1} T(n,k) * T(n,k+1), with T given by A026323.
%K nonn
%O 1,1
%A _Clark Kimberling_
%E More terms and title corrected by _Sean A. Irvine_, Oct 27 2019
