Least number k that reaches 1 after n iterations of A206369.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =8a(6) =15a(7) =17a(8) =69a(9) =121a(10) =137a(11) =467a(12) =985a(13) =1949a(14) =4049a(15) =8117a(16) =14641a(17) =36383a(18) =62501a(19) =125003a(20) =250007a(21) =958081a(22) =1817513a(23) =3325981a(24) =8062091a(25) =21233813a(26) =42467627a(27) =125828819a(28) =343955189