a(n) = (greatest base 8 digit of n) - (least base 8 digit of n).

Terms

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