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 A182800 #5 Mar 30 2012 18:57:12 %S A182800 4,6,9,10,13,14,16,19,20,21,23,24,27,29,31,32,33,36,37,39,42,43,45,47, %T A182800 48,49,51,52,53,54,58,61,63,64,65,66,67,69,71,72,75,76,77,78,79,82,84, %U A182800 85,86,88,91,92,95,96,97,100,103,104,105,106,107,108,110,111,112 %N A182800 Positions of composites in A167171. %C A182800 Complement of A182799. %e A182800 A167171=(2,3,5,6,7,10,11,13,14,15,17,19,21,,,)consists of primes and products p*q of distinct primes. %e A182800 a(1)=4 because 6 is in position 4. %Y A182800 Cf. A000040, A167171, A182799. %K A182800 nonn %O A182800 1,1 %A A182800 _Clark Kimberling_, Dec 03 2010