A169859 Smallest nontrivial square (i.e., not of the form 10^2k, k>0) with at least n identical adjacent digits.

1, 144, 1444, 1666681, 111112681, 3333330225, 132922222225, 1433333333961, 2582708888888881, 28777777777780164, 88888888888905609, 2222222222222640225, 2222222222222640225

Offset

1,2

Links

Table of n, a(n) for n=1..13.

Example

a(3) = 1444 because it has 3 adjacent 4's and no square less than 1444 has 3 adjacent digits which are the same.

Crossrefs

Sequence in context: A222515 A023096 A223435 * A137416 A109117 A209205

Adjacent sequences: A169856 A169857 A169858 * A169860 A169861 A169862

Keyword

nonn,base

Author

Jon E. Schoenfield, May 14 2010

Status

approved