a(n) = the largest number one can subtract from 10^n such that the square of the result is strictly greater than 10^(2*n-1).

A128869

a(n) = the largest number one can subtract from 10^n such that the square of the result is strictly greater than 10^(2*n-1).

Terms

    a(0) =6a(1) =68a(2) =683a(3) =6837a(4) =68377a(5) =683772a(6) =6837722a(7) =68377223a(8) =683772233a(9) =6837722339a(10) =68377223398a(11) =683772233983

External references