a(n) is the least number k such that A349474(k) = n, or -1 if no such k exists.

Terms

a(0) =1a(1) =2a(2) =5a(3) =4a(4) =21a(5) =25a(6) =16a(7) =36a(8) =106a(9) =712a(10) =1588a(11) =3775a(12) =900a(13) =4356a(14) =18496a(15) =14400a(16) =45700a(17) =87003a(18) =135445a(19) =229543a(20) =554216a(21) =937019a(22) =1764724a(23) =3431952a(24) =3431088a(25) =10217808a(26) =21357233a(27) =36972202a(28) =42436276a(29) =79056144