a(n) = smallest m such that A308194(m) = n, or -1 if no such m exists.

Terms

a(0) =5a(1) =6a(2) =8a(3) =7a(4) =10a(5) =11a(6) =23a(7) =29a(8) =101a(9) =137a(10) =757a(11) =1621a(12) =3238a(13) =15537a(14) =44851a(15) =155269a(16) =784522a(17) =2495326a(18) =7485969a(19) =51719803a(20) =119775247a(21) =2017072213a(22) =5629349191a(23) =40094417851