Transform of 1 by the T_{1,1} transformation (see link).

Terms

a(0) =2a(1) =4a(2) =10a(3) =24a(4) =56a(5) =130a(6) =302a(7) =702a(8) =1632a(9) =3794a(10) =8820a(11) =20504a(12) =47666a(13) =110810a(14) =257602a(15) =598852a(16) =1392162a(17) =3236384a(18) =7523680a(19) =17490434a(20) =40660326a(21) =94523790a(22) =219741152a(23) =510836202a(24) =1187550092a(25) =2760719024a(26) =6417893090a(27) =14919791314a(28) =34684306786