A375997 The smallest positive number that when written in all bases 2 to n contains three or more adjacent equal digits.

7, 39, 234, 687, 3882, 13999, 196017, 786499, 2790000, 3898880, 150002496, 150002496, 22094555327, 164777407488

Offset

2,1

Links

Table of n, a(n) for n=2..15.

Example

a(7) = 13999 as 13999 = 11011010101111_2 = 201012111_3 = 3122233_4 = 421444_5 = 144451_6 = 55546_7, each of which contains three or more adjacent equal digits.

Crossrefs

Cf. A375958, A375998, A171901, A055085, A368866.

Sequence in context: A155589 A071082 A122884 * A370228 A139173 A219437

Adjacent sequences: A375994 A375995 A375996 * A375998 A375999 A376000

Keyword

nonn,more

Author

Scott R. Shannon, Sep 05 2024

Status

approved