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 A048319 #9 Nov 14 2020 17:43:06 %S A048319 0,1,2,3,4,5,6,7,9,18,27,36,45,54,63,72,73,74,75,76,77,78,79,144,145, %T A048319 146,147,148,149,150,151,216,217,218,219,220,221,222,223,288,289,290, %U A048319 291,292,293,294,295,360,361,362,363,364,365,366,367,432,433,434,435 %N A048319 Numbers whose base-8 expansions, read from left to right, have run lengths that strictly decrease. %t A048319 Select[Range[0,500],Max[Differences[Length/@Split[IntegerDigits[#,8]]]] < 0&] (* _Harvey P. Dale_, Nov 14 2020 *) %Y A048319 Cf. A037013, A043697, A043711, A044819, A044957. %K A048319 nonn,base %O A048319 0,3 %A A048319 _Patrick De Geest_, Feb 15 1999