The Collatz (3x+1) iteration in A220145 converted to decimal.

Terms

a(0) =1a(1) =2a(2) =133a(3) =4a(4) =33a(5) =266a(6) =67733a(7) =8a(8) =541865a(9) =66a(10) =16933a(11) =532a(12) =529a(13) =135466a(14) =135253a(15) =16a(16) =4233a(17) =1083730a(18) =1083717a(19) =132a(20) =129a(21) =33866a(22) =33813a(23) =1064a(24) =8669737a(25) =1058a(27) =270932a(28) =270929a(29) =270506a(31) =32