%I #8 Oct 27 2019 19:59:21
%S 1,6,50,394,3120,24922,200676,1627434,13282008,109014050,899304906,
%T 7452793766,62019712684,518052932358,4342182907626,36509428285466,
%U 307859922637008,2602876165613074,22060637925756358,187399432888840254,1595268339755117256
%N a(n) = Sum_{k=0..m} T(n,k) * T(n,k+1), where m=0 for n=1; m=n+1 for n >= 2; and T is given by A026148.
%K nonn
%O 1,2
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 27 2019