A Golomb-like recurrence that decreases infinitely often.

Terms

a(0) =2a(1) =8a(2) =6a(3) =4a(4) =2a(5) =24a(6) =22a(7) =20a(8) =18a(9) =16a(10) =14a(11) =12a(12) =10a(13) =8a(14) =6a(15) =4a(16) =2a(17) =72a(18) =70a(19) =68a(20) =66a(21) =64a(22) =62a(23) =60a(24) =58a(25) =56a(26) =54a(27) =52a(28) =50a(29) =48