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 A048325 #6 Oct 13 2019 16:37:06 %S A048325 0,1,2,3,4,5,6,7,8,9,10,11,12,13,15,30,45,60,75,90,105,120,135,150, %T A048325 165,180,195,210,211,212,213,214,215,216,217,218,219,220,221,222,223, %U A048325 420,421,422,423,424,425,426,427,428,429,430,431,432,433,630,631,632,633 %N A048325 Numbers whose base-14 expansions, read from left to right, have run lengths that strictly decrease. %Y A048325 Cf. A037013, A043703, A043717, A044825, A044963. %K A048325 nonn,base %O A048325 0,3 %A A048325 _Patrick De Geest_, Feb 15 1999