n-th term is binary string of length t_n with 1's at positions t_i, where t_n = n-th triangular number.

A076127

n-th term is binary string of length t_n with 1's at positions t_i, where t_n = n-th triangular number.

Terms

    a(0) =0a(1) =1a(2) =101a(3) =101001a(4) =1010010001

External references