Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,1.

A037652

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,1.

Terms

    a(0) =3a(1) =30a(2) =301a(3) =3013a(4) =30130a(5) =301301a(6) =3013013a(7) =30130130a(8) =301301301a(9) =3013013013a(10) =30130130130a(11) =301301301301

External references