T(n,[ n/2 ]), T given by A026659.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =13a(6) =26a(7) =59a(8) =118a(9) =205a(10) =410a(11) =973a(12) =1946a(13) =3479a(14) =6958a(15) =16882a(16) =33764a(17) =61319a(18) =122638a(19) =301486a(20) =602972a(21) =1105973a(22) =2211946a(23) =5485128a(24) =10970256a(25) =20259303a(26) =40518606a(27) =101097960a(28) =202195920a(29) =375265833