3x+1 sequence starting at 57.

Terms

a(0) =57a(1) =172a(2) =86a(3) =43a(4) =130a(5) =65a(6) =196a(7) =98a(8) =49a(9) =148a(10) =74a(11) =37a(12) =112a(13) =56a(14) =28a(15) =14a(16) =7a(17) =22a(18) =11a(19) =34a(20) =17a(21) =52a(22) =26a(23) =13a(24) =40a(25) =20a(26) =10a(27) =5a(28) =16a(29) =8