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 A048302 #6 Oct 13 2019 16:43:22 %S A048302 0,1,2,3,4,6,12,18,24,25,31,37,43,49,50,56,62,68,74,75,81,87,93,99, %T A048302 100,106,112,118,124,125,156,187,218,249,250,281,312,343,374,375,406, %U A048302 437,468,499,500,531,562,593,624,625,750,781,812,843,874,937,1093,1249 %N A048302 Numbers whose base-5 expansions, read from left to right, have run lengths that strictly increase. %Y A048302 Cf. A037015, A043694, A043708, A044816, A044954. %K A048302 nonn,base %O A048302 0,3 %A A048302 _Patrick De Geest_, Feb 15 1999