Number of untouchable numbers <= 10^n.

A057978

Number of untouchable numbers <= 10^n.

Terms

    a(0) =2a(1) =5a(2) =89a(3) =1212a(4) =13863a(5) =150232a(6) =1574973a(7) =16246940a(8) =165826606a(9) =1681871718a(10) =16988116409a(11) =171128671374

External references