%I
%S 1,6,35,154,613,2882,14995,68730,291606,1378110,7047087,32801046,
%T 143237183,681449778,3462931356,16261134650,72210836920,345094694354,
%U 1747534150303,8253521588404,37063741964059,177681801860358,897584067273979,4256535683245074,19269823577105032
%N a(n) = Sum_{k=0..n1} T(n,k) * T(n,k+1), with T given by A026681.
%K nonn
%O 1,2
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 20 2019
