Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,2,3.

A037610

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,2,3.

Terms

    a(0) =1a(1) =12a(2) =123a(3) =1231a(4) =12312a(5) =123123a(6) =1231231a(7) =12312312a(8) =123123123a(9) =1231231231a(10) =12312312312a(11) =123123123123

External references