Row sums of triangle A163840.

Terms

a(0) =1a(1) =3a(2) =10a(3) =41a(4) =116a(5) =427a(6) =1240a(7) =4181a(8) =12472a(9) =40091a(10) =121364a(11) =380701a(12) =1160186a(13) =3593969a(14) =10979532a(15) =33785469a(16) =103258800a(17) =316532947a(18) =966976444a(19) =2957131673a(20) =9026437602a(21) =27558146133a(22) =84043120308a(23) =256263107177a(24) =780817641926