Odd numbers in the (1,2)-Pascal triangle A029635.

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =5a(5) =1a(6) =5a(7) =9a(8) =7a(9) =1a(10) =9a(11) =1a(12) =7a(13) =25a(14) =11a(15) =1a(16) =27a(17) =55a(18) =13a(19) =1a(20) =9a(21) =35a(22) =77a(23) =105a(24) =91a(25) =49a(26) =15a(27) =1a(28) =17a(29) =1