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 A048323 #6 Oct 13 2019 16:35:16 %S A048323 0,1,2,3,4,5,6,7,8,9,10,11,13,26,39,52,65,78,91,104,117,130,143,156, %T A048323 157,158,159,160,161,162,163,164,165,166,167,312,313,314,315,316,317, %U A048323 318,319,320,321,322,323,468,469,470,471,472,473,474,475,476,477,478 %N A048323 Numbers whose base-12 expansions, read from left to right, have run lengths that strictly decrease. %Y A048323 Cf. A037013, A043701, A043715, A044823, A044961. %K A048323 nonn,base %O A048323 0,3 %A A048323 _Patrick De Geest_, Feb 15 1999