Image of n under the map n->n/2 if n even, n->3n-1 if n odd.

Terms

a(0) =0a(1) =2a(2) =1a(3) =8a(4) =2a(5) =14a(6) =3a(7) =20a(8) =4a(9) =26a(10) =5a(11) =32a(12) =6a(13) =38a(14) =7a(15) =44a(16) =8a(17) =50a(18) =9a(19) =56a(20) =10a(21) =62a(22) =11a(23) =68a(24) =12a(25) =74a(26) =13a(27) =80a(28) =14a(29) =86