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 A167175 #10 Jun 19 2016 03:02:51 %S A167175 1,2,3,5,7,11,13,16,17,19,23,24,29,31,36,37,40,41,43,47,53,54,56,59, %T A167175 60,61,64,67,71,73,79,81,83,84,88,89,90,96,97,100,101,103,104,107,109, %U A167175 113,126,127,131,132,135,136,137,139,140,144,149,150,151,152,156,157,160 %N A167175 Numbers with a nonprime number of prime divisors (counted with multiplicity). %H A167175 G. C. Greubel, <a href="/A167175/b167175.txt">Table of n, a(n) for n = 1..1000</a> %t A167175 Select[Range[200],!PrimeQ[PrimeOmega[#]]&] (* _Harvey P. Dale_, Apr 14 2013 *) %o A167175 (PARI) is(n)=!isprime(bigomega(n)) \\ _Charles R Greathouse IV_, Jun 19 2016 %Y A167175 Cf. A001222, A063989, A141468. %K A167175 nonn %O A167175 1,2 %A A167175 _Juri-Stepan Gerasimov_, Oct 29 2009 %E A167175 86 replaced by 96, 112 and 124 removed, 147 replaced by 144, 153 removed - _R. J. Mathar_, Apr 14 2010