Row sums of A050157.

Terms

a(0) =1a(1) =3a(2) =13a(3) =58a(4) =257a(5) =1126a(6) =4882a(7) =20980a(8) =89497a(9) =379438a(10) =1600406a(11) =6720748a(12) =28117498a(13) =117254268a(14) =487589572a(15) =2022568168a(16) =8371423177a(17) =34581780478a(18) =142605399982a(19) =587138954428