2-adic valuation of A052129.

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =6a(5) =12a(6) =25a(7) =50a(8) =103a(9) =206a(10) =413a(11) =826a(12) =1654a(13) =3308a(14) =6617a(15) =13234a(16) =26472a(17) =52944a(18) =105889a(19) =211778a(20) =423558a(21) =847116a(22) =1694233a(23) =3388466a(24) =6776935a(25) =13553870a(26) =27107741a(27) =54215482a(28) =108430966a(29) =216861932