Row sums of A027052.

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =31a(5) =84a(6) =233a(7) =656a(8) =1865a(9) =5338a(10) =15355a(11) =44342a(12) =128455a(13) =373100a(14) =1086087a(15) =3167634a(16) =9254009a(17) =27074666a(18) =79316491a(19) =232633206a(20) =683026535a(21) =2007327660a(22) =5904415195a(23) =17381265934a(24) =51203990457a(25) =150945252394a(26) =445252685313