A132392 a(n) = smallest number k such that the decimal expansion of k^n begins with a string of at least n identical digits.

1, 15, 322, 167, 6444, 32183, 7306, 225418, 6551032, 683405939, 7074698775, 26331754107, 844494314469, 1247955519394, 251188643150958, 93364101391902, 16114920282762613, 239390020079624346, 191165654339590395, 3098813483887370178, 41804838226534899989

Offset

1,2

Links

Hans Havermann, Table of n, a(n) for n = 1..100

Example

1^1 = 1, 15^2 = 225, 322^3 = 33386248, ...

Crossrefs

See A131699 for another version.

Sequence in context: A088913 A053102 A327556 * A131699 A077738 A068124

Adjacent sequences: A132389 A132390 A132391 * A132393 A132394 A132395

Keyword

nonn,base

Author

Jonathan Vos Post, Aug 29 2007

Extensions

More terms from Hans Havermann, Aug 30 2007

Status

approved