Number of steps to reach 1 in sequence A000546.

Terms

a(0) =0a(1) =9a(2) =18a(3) =37a(4) =25a(5) =120a(6) =36a(7) =47a(8) =42a(9) =59a(10) =137a(11) =143a(12) =51a(13) =48a(14) =141a(15) =41a(16) =57a(17) =73a(18) =77a(19) =76a(20) =166a(21) =80a(22) =104a(23) =93a(24) =78a(25) =96a(26) =181a(27) =102a(28) =91a(29) =102