Nonzero Dyck natural numbers encoded as binary integers.

Terms

a(0) =10a(1) =1100a(2) =101100a(3) =111000a(4) =10101100a(5) =11001100a(6) =1010101100a(7) =11011000a(8) =10111000a(9) =1100101100a(10) =101010101100a(11) =1110001100a(13) =110010101100a(14) =1011001100a(15) =11110000a(17) =1100111000a(19) =111000101100a(20) =101100101100