3x+1 sequence starting at 99.

Terms

a(0) =99a(1) =298a(2) =149a(3) =448a(4) =224a(5) =112a(6) =56a(7) =28a(8) =14a(9) =7a(10) =22a(11) =11a(12) =34a(13) =17a(14) =52a(15) =26a(16) =13a(17) =40a(18) =20a(19) =10a(20) =5a(21) =16a(22) =8a(23) =4a(24) =2a(25) =1a(26) =4a(27) =2a(28) =1a(29) =4