%I #11 Oct 27 2019 11:35:07
%S 1,3,8,23,59,158,395,1023,2522,6414,15694,39486,96226,240470,584762,
%T 1454777,3533743,8763720,21276031,52642872,127770797,315574532,
%U 765852193,1888788990,4583560631,11290381790,27397549743,67414670138
%N a(n) = Sum_{k=0..n} (k+1) * A026769(n, n-k).
%K nonn
%O 0,2
%A _Clark Kimberling_