Value of A063882 at end of n-th generation of terms.

Terms

a(0) =1a(1) =5a(2) =11a(3) =23a(4) =48a(5) =97a(6) =196a(7) =393a(8) =787a(9) =1576a(10) =3153a(11) =6308a(12) =12617a(13) =25235a(14) =50472a(15) =100945a(16) =201892a(17) =403785