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 A387173 #8 Aug 22 2025 08:44:29
%S A387173 0,0,1,1,1,1,1,1,2,1,2,1,2,2,1,2,2,2,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,
%T A387173 2,2,2,2,2,3,2,2,3,2,2,2,3,2,2,3,2,3,2,2,3,2,3,2,2,3,2,3,2,3,2,3,2,3,
%U A387173 2,3,2,3,3,2,3,2,3,3,2,3,2,3,3,2,3,3,2,3,3,2
%N A387173 First differences of A067175.
%C A387173 From n = 2, run lengths of A385863.
%H A387173 Paolo Xausa, <a href="/A387173/b387173.txt">Table of n, a(n) for n = 0..10000</a>
%t A387173 Differences[Join[{1}, IntegerLength[FoldList[Times, Prime[Range[100]]]]]]
%Y A387173 Cf. A067175, A385863.
%K A387173 nonn,base,easy,new
%O A387173 0,9
%A A387173 _Paolo Xausa_, Aug 20 2025