Row sums of triangle A115127.

Terms

a(0) =3a(1) =13a(2) =45a(3) =148a(4) =486a(5) =1618a(6) =5478a(7) =18841a(8) =65692a(9) =231713a(10) =825386a(11) =2964937a(12) =10728241a(13) =39065505a(14) =143047469a(15) =526399048a(16) =1945668327a(17) =7220164256a(18) =26889574045a(19) =100469991084a(20) =376513308113