Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,2,0.

A037511

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,2,0.

Terms

    a(0) =1a(1) =12a(2) =120a(3) =1201a(4) =12012a(5) =120120a(6) =1201201a(7) =12012012a(8) =120120120a(9) =1201201201a(10) =12012012012a(11) =120120120120

External references