Row sums of triangle A089940.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =19a(5) =42a(6) =90a(7) =197a(8) =424a(9) =923a(10) =1989a(11) =4315a(12) =9300a(13) =20129a(14) =43374a(15) =93724a(16) =201888a(17) =435713a(18) =938218a(19) =2022972a(20) =4354569a(21) =9382489a(22) =20190181a(23) =43477688a(24) =93534469a(25) =201326672a(26) =433017364a(27) =931701321a(28) =2003520121a(29) =4309597827