The "binary Pascal triangle" read by rows.

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =10a(5) =0a(6) =1a(7) =110a(8) =100a(9) =0a(10) =1a(11) =1110a(12) =110100a(13) =1000a(14) =0a(15) =1a(16) =11110a(17) =1110110100a(18) =1101001000a(19) =10000a(20) =0a(21) =1a(22) =111110a(26) =100000a(27) =0a(28) =1a(29) =1111110