Odd bisection of A374431.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =27a(5) =11a(6) =13a(7) =30375a(8) =17a(9) =19a(10) =750141a(11) =23a(12) =3125a(13) =19683a(14) =29a(15) =31a(16) =235782657a(17) =1313046875a(18) =37a(19) =3502727631a(20) =41a(21) =43a(23) =47a(24) =823543a(25) =634465620819a(26) =53a(29) =59a(30) =61