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 A091373 #3 Mar 30 2012 18:50:43
%S A091373 0,0,0,1,1,2,2,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,7,7,7,7,7,7,7,8,
%T A091373 8,8,8,9,9,9,9,9,9,9,10,11,11,11,11,11,11,11,11,11,11,11,11,12,12,12,
%U A091373 12,13,14,14,14,14,14,14,14,14,14,14,14,15,16,16,16,16,16,16,16,17,17
%N A091373 Number of numbers <= n having exactly as many prime factors as the value of their smallest prime factor.
%C A091373 a(n) = #{m: A001222(m)=A020639(m), m<=n};
%C A091373 A091372(n) + a(n) + A091374(n) = n.
%Y A091373 Cf. A091376, A091371.
%K A091373 nonn
%O A091373 1,6
%A A091373 _Reinhard Zumkeller_, Jan 04 2004