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 A048305 #8 Oct 13 2019 16:42:23 %S A048305 0,1,2,3,4,5,6,7,9,18,27,36,45,54,63,64,73,82,91,100,109,118,127,128, %T A048305 137,146,155,164,173,182,191,192,201,210,219,228,237,246,255,256,265, %U A048305 274,283,292,301,310,319,320,329,338,347,356,365,374,383,384,393,402 %N A048305 Numbers whose base-8 expansions, read from left to right, have run lengths that strictly increase. %t A048305 Select[Range[0,500],Min[Differences[Length/@Split[IntegerDigits[ #,8]]]]>0&] (* _Harvey P. Dale_, Dec 06 2018 *) %Y A048305 Cf. A037015, A043697, A043711, A044819, A044957. %K A048305 nonn,base %O A048305 0,3 %A A048305 _Patrick De Geest_, Feb 15 1999