Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,0,1.

A033128

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,0,1.

Terms

    a(0) =1a(1) =10a(2) =101a(3) =1011a(4) =10110a(5) =101101a(6) =1011011a(7) =10110110a(8) =101101101a(9) =1011011011a(10) =10110110110a(11) =101101101101

External references