Permutations of 1,2,...,n for n=1,2,3,..., arranged antilexicographically.

Terms

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