3x+1 sequence starting at 39.

Terms

a(0) =39a(1) =118a(2) =59a(3) =178a(4) =89a(5) =268a(6) =134a(7) =67a(8) =202a(9) =101a(10) =304a(11) =152a(12) =76a(13) =38a(14) =19a(15) =58a(16) =29a(17) =88a(18) =44a(19) =22a(20) =11a(21) =34a(22) =17a(23) =52a(24) =26a(25) =13a(26) =40a(27) =20a(28) =10a(29) =5