Denominators in a certain bijection from positive integers to positive rationals.

Terms

a(0) =1a(1) =2a(2) =1a(3) =3a(4) =1a(5) =4a(6) =3a(7) =2a(8) =1a(9) =5a(10) =1a(11) =6a(12) =5a(13) =4a(14) =3a(15) =2a(16) =1a(17) =7a(18) =5a(19) =3a(20) =1a(21) =8a(22) =7a(23) =5a(24) =4a(25) =2a(26) =1a(27) =9a(28) =7a(29) =3