Row sums of A320906.

Terms

a(0) =0a(1) =1a(2) =7a(3) =33a(4) =130a(5) =461a(6) =1525a(7) =4802a(8) =14577a(9) =43025a(10) =124226a(11) =352437a(12) =985821a(13) =2725858a(14) =7466185a(15) =20291193a(16) =54791842a(17) =147164525a(18) =393517477a(19) =1048395650a(20) =2784568545a(21) =7377137441a(22) =19503081602a(23) =51470797413a(24) =135641216685a(25) =357029910946a(26) =938837513785