%I #9 Oct 18 2019 04:02:47
%S 4,48,469,4222,36715,313912,2661888,22486072,189688752,1600198048,
%T 13510004742,114204762280,966871825132,8199071477920,69645535691958,
%U 592592023212504,5050571335425668,43114956743414712,368632989326212821,3156551837806702698
%N a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026300.
%K nonn
%O 3,1
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Oct 17 2019