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 A081166 #8 May 19 2024 03:17:36 %S A081166 0,0,1,2,2,3,3,3,4,5,6,12,16,20,31,50,70,106,143 %N A081166 Number of distinct primes dividing A060114(n). %F A081166 a(n) = A001221(A060114(n)). %Y A081166 Cf. A001221, A060114, A081165. %K A081166 nonn,more %O A081166 0,4 %A A081166 _Antti Karttunen_ and _Wouter Meeussen_, Mar 10 2003