Row sums of A153521.

Terms

a(0) =2a(1) =22a(2) =242a(3) =2662a(4) =7986a(5) =45254a(6) =178354a(7) =854502a(8) =3670898a(9) =16741318a(10) =73862514a(11) =331879526a(12) =1476246706a(13) =6603168198a(14) =29445050162a(15) =131524950502a(16) =586945452786