Odd numbers producing 4 odd numbers in the Collatz iteration.

Terms

a(0) =17a(1) =35a(2) =69a(3) =75a(4) =141a(5) =151a(6) =277a(7) =301a(8) =565a(9) =605a(10) =1109a(11) =1137a(12) =1205a(13) =2261a(14) =2275a(15) =2417a(16) =2421a(17) =4437a(18) =4549a(19) =4821a(20) =4835a(21) =4849a(22) =9045a(23) =9101a(24) =9669a(25) =9685a(26) =9699a(27) =17749a(28) =18197a(29) =19285