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 A033025 #10 Aug 14 2021 16:13:09 %S A033025 13,26,39,52,65,78,91,104,117,130,143,157,314,471,628,785,942,1099, %T A033025 1256,1413,1570,1727,1872,1885,1898,1911,1924,1937,1950,1963,1976, %U A033025 1989,2002,2015,3744,3757,3770,3783,3796,3809,3822 %N A033025 Numbers whose base-12 expansion has no run of digits with length < 2. %H A033025 Vincenzo Librandi, <a href="/A033025/b033025.txt">Table of n, a(n) for n = 1..1100</a> %t A033025 Select[Range[10000], Min[Length/@Split[IntegerDigits[#, 12]]]>1&] (* _Vincenzo Librandi_, Feb 05 2014 *) %K A033025 nonn,base %O A033025 1,1 %A A033025 _Clark Kimberling_