Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,1,2,0.

A037785

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,1,2,0.

Terms

    a(0) =3a(1) =31a(2) =312a(3) =3120a(4) =31203a(5) =312031a(6) =3120312a(7) =31203120a(8) =312031203a(9) =3120312031a(10) =31203120312a(11) =312031203120

External references