A113562 Least multiple of n in which the n-th digit from left is 7.

7, 170, 117, 10072, 100070, 1000074, 1000027, 100000072, 100000017, 10000000070, 10000000087, 1000000000176, 1000000000077, 100000000000278, 1000000000000170, 10000000000000176, 10000000000000067, 1000000000000000170

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Example

a(4)= 10072, in which the fourth digit is 7.

Mathematica

lmn7[n_]:=Module[{k=Ceiling[10^(n-1)/n]}, While[NumberDigit[k n, IntegerLength[ k n]-n]!=7, k++]; k n]; Array[lmn7, 10] (* The program generates the first 10 terms of the sequence. *)  (* Harvey P. Dale, Nov 02 2022 *)

Crossrefs

Cf. A113556, A113557, A113558, A113559, A113560, A113561.

Sequence in context: A351154 A005019 A172027 * A157203 A178019 A337676

Adjacent sequences: A113559 A113560 A113561 * A113563 A113564 A113565

Keyword

base,easy,nonn

Author

Amarnath Murthy, Nov 06 2005

Extensions

More terms from Joshua Zucker, May 03 2006

Status

approved