If A319303(k) = n for some k, then a(n) = k, else a(n) = -1.

Terms

a(0) =0a(1) =1a(2) =12a(3) =2a(4) =6a(5) =16a(6) =198a(7) =3a(8) =454a(9) =8a(10) =102a(11) =20a(12) =22a(13) =262a(14) =378a(15) =4a(16) =54a(17) =582a(18) =742a(19) =10a(20) =11a(21) =134a(22) =186a(23) =24a(24) =1766a(25) =30a(27) =326a(28) =358a(29) =506a(31) =5