Quotient of 'base-21' division described in A032573.

Terms

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