Base 4 digital convolution sequence.

Terms

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