Binary numbers (digits in {0, 1}) with no run of digits with length < 2.

Terms

a(0) =11a(1) =111a(2) =1100a(3) =1111a(4) =11000a(5) =11100a(6) =11111a(7) =110000a(8) =110011a(9) =111000a(10) =111100a(11) =111111a(12) =1100000a(13) =1100011a(14) =1100111a(15) =1110000a(16) =1110011a(17) =1111000a(18) =1111100a(19) =1111111a(20) =11000000a(21) =11000011a(22) =11000111a(23) =11001100a(24) =11001111a(25) =11100000a(26) =11100011a(27) =11100111a(28) =11110000a(29) =11110011