Integer part of decimal 'base-4 looking' numbers divided by their actual base-4 values.

Terms

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