A109613(n)-fold concatenation of A008619(n).

A180115

A109613(n)-fold concatenation of A008619(n).

Terms

    a(0) =1a(1) =111a(2) =222a(3) =22222a(4) =33333a(5) =3333333a(6) =4444444a(7) =444444444a(8) =555555555a(9) =55555555555a(10) =66666666666

External references