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 A048312 #8 Oct 13 2019 16:39:06 %S A048312 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,16,32,48,64,80,96,112,128,144,160, %T A048312 176,192,208,224,225,241,257,273,289,305,321,337,353,369,385,401,417, %U A048312 433,449,450,466,482,498,514,530,546,562,578,594,610,626,642,658,674 %N A048312 Numbers whose base-15 expansions, read from left to right, have run lengths that strictly increase. %t A048312 Select[Range[0,700],Min[Differences[Length/@Split[IntegerDigits[ #, 15]]]]>0&] (* _Harvey P. Dale_, Nov 08 2017 *) %Y A048312 Cf. A037015, A043704, A043718, A044826, A044964. %K A048312 nonn,base %O A048312 0,3 %A A048312 _Patrick De Geest_, Feb 15 1999