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 A048303 #8 Oct 13 2019 16:43:04 %S A048303 0,1,2,3,4,5,7,14,21,28,35,36,43,50,57,64,71,72,79,86,93,100,107,108, %T A048303 115,122,129,136,143,144,151,158,165,172,179,180,187,194,201,208,215, %U A048303 216,259,302,345,388,431,432,475,518,561,604,647,648,691,734,777,820 %N A048303 Numbers whose base-6 expansions, read from left to right, have run lengths that strictly increase. %t A048303 Select[Range[0,900],Min[Differences[Length/@Split[IntegerDigits[ #,6]]]]> 0&] (* _Harvey P. Dale_, Jan 14 2014 *) %Y A048303 Cf. A037015, A043695, A043709, A044817, A044955. %K A048303 nonn,base %O A048303 0,3 %A A048303 _Patrick De Geest_, Feb 15 1999