Row sums of a Pascal-Jacobsthal triangle.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =18a(5) =44a(6) =110a(7) =272a(8) =662a(9) =1596a(10) =3838a(11) =9240a(12) =22286a(13) =53812a(14) =129974a(15) =313888a(16) =757878a(17) =1829644a(18) =4416910a(19) =10662952a(20) =25742302a(21) =62147556a(22) =150038438a(23) =362226480a(24) =874493446a(25) =2111213372a(26) =5096916094a(27) =12305037368a(28) =29706982638a(29) =71719002644