Trajectory of 3 under repeated application of x -> A306958(x).

Terms

a(0) =3a(1) =720a(2) =604891a(3) =5599451a(4) =7353370a(5) =1242001a(6) =5242a(7) =35460a(8) =187201a(9) =2419311a(10) =3634680a(11) =2123281a(12) =1815410a(13) =1849711a(14) =6053070a(15) =786963a(16) =6351120a(17) =182271a(18) =2419400a(19) =3638982a(20) =7410330a(21) =611292a(22) =3780200a(23) =2420013a(24) =5952a(25) =3689370a(26) =6200641a(27) =307542a(28) =640891a(29) =5599451