An example of a d-perfect sequence: a(2*n) = 0, a(2*n+1) = Catalan(n) mod 3.

Terms

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