Least inverse of A114912, or -1 if no inverse exists.

Terms

a(0) =0a(1) =3a(2) =6a(3) =9a(4) =443a(5) =16a(6) =20a(7) =60a(8) =29a(9) =34a(10) =53a(11) =45a(12) =298a(13) =68a(14) =224a(15) =778a(16) =1356a(17) =4024a(18) =4186a(19) =8945a(20) =8463a(21) =20402a(22) =26125a(23) =86617a(24) =123486a(25) =133234a(26) =391349a(27) =365860a(28) =1290138a(29) =2973609