Row sums of number triangle A112739.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =13a(5) =26a(6) =58a(7) =147a(8) =423a(9) =1366a(10) =4880a(11) =19039a(12) =80281a(13) =362914a(14) =1747598a(15) =8918299a(16) =48024291a(17) =271891710a(18) =1613325844a(19) =10005690695a(20) =64702147429a(21) =435311589418