Duplicate of A051900.

Terms

a(0) =3a(1) =5a(2) =13a(3) =17a(4) =113a(5) =97a(6) =193a(7) =257a(8) =769a(9) =11777a(10) =13313a(11) =59393a(12) =12289a(13) =40961a(14) =114689a(15) =65537a(16) =2424833a(17) =6946817a(18) =786433a(19) =5767169a(20) =7340033a(21) =23068673a(22) =155189249a(23) =595591169a(24) =1224736769a(25) =167772161a(26) =469762049a(27) =2281701377a(28) =3489660929a(29) =12348030977