A375958 The smallest positive number that when written in all bases 2 to n contains two or more adjacent equal digits.

3, 4, 22, 31, 43, 122, 506, 506, 1187, 3199, 11663, 18773, 18815, 32399, 177216, 177216, 177227, 5225284, 5225284, 14295600, 21566225, 36572552, 107730081, 107832239, 952416000, 2293096006, 5587865542, 6587515515, 30174888567, 30174888567, 107824082399

Offset

2,1

Links

Table of n, a(n) for n=2..32.

Example

a(7) = 122 as 122 = 1111010_2 = 11112_3 = 1322_4 = 442_5 = 322_6 = 233_7, each of which contains two or more adjacent equal digits.

Crossrefs

Cf. A375997, A375998, A171901, A055085, A368866.

Sequence in context: A395511 A057791 A167452 * A316192 A122660 A163744

Adjacent sequences: A375955 A375956 A375957 * A375959 A375960 A375961

Keyword

nonn

Author

Scott R. Shannon, Sep 03 2024

Status

approved