This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A375997 #6 Sep 05 2024 08:07:35 %S A375997 7,39,234,687,3882,13999,196017,786499,2790000,3898880,150002496, %T A375997 150002496,22094555327,164777407488 %N A375997 The smallest positive number that when written in all bases 2 to n contains three or more adjacent equal digits. %e A375997 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. %Y A375997 Cf. A375958, A375998, A171901, A055085, A368866. %K A375997 nonn,more %O A375997 2,1 %A A375997 _Scott R. Shannon_, Sep 05 2024