A124654 Largest n-digit number m such that m and m^10 are zeroless.

7, 92, 992, 9924, 99556, 999572, 9998693, 99996927, 999985976, 9999957996, 99999789966, 999999779234, 9999998979517, 99999997832434, 999999992914885, 9999999982155956

Offset

1,1

Links

Table of n, a(n) for n=1..16.

Mathematica

Table[Module[{k=10^n-1}, While[DigitCount[k, 10, 0]>0||DigitCount[k^10, 10, 0]>0, k--]; k], {n, 16}] (* Harvey P. Dale, Mar 28 2025 *)

Crossrefs

Sequence in context: A317370 A282041 A027955 * A267204 A367158 A278687

Adjacent sequences: A124651 A124652 A124653 * A124655 A124656 A124657

Keyword

base,nonn

Author

Zak Seidov, Dec 22 2006

Status

approved