Row sums of triangle A091615.

Terms

a(0) =1a(1) =3a(2) =7a(3) =18a(4) =43a(5) =102a(6) =241a(7) =563a(8) =1293a(9) =2960a(10) =6722a(11) =15140a(12) =33919a(13) =75576a(14) =167490a(15) =369556a(16) =811953a(17) =1776993a(18) =3875220a(19) =8423004a(20) =18251468a(21) =39435686a(22) =84980633a(23) =182669118a(24) =391736024a(25) =838237802a(26) =1789955529a(27) =3814790598a(28) =8115210879