Transform of the finite sequence (1, 0, -1) by the T_{1,0} transformation (see link).

Terms

a(0) =1a(1) =2a(2) =4a(3) =11a(4) =26a(5) =60a(6) =139a(7) =323a(8) =751a(9) =1746a(10) =4059a(11) =9436a(12) =21936a(13) =50995a(14) =118549a(15) =275593a(16) =640676a(17) =1489391a(18) =3462414a(19) =8049136a(20) =18711971a(21) =43500055a(22) =101125359a(23) =235087938a(24) =546513151a(25) =1270488936a(26) =2953528444a(27) =6866120611a(28) =15961793881a(29) =37106668865