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 A067028 #15 Dec 09 2024 10:13:11 %S A067028 16,24,36,40,54,56,60,64,81,84,88,90,96,100,104,126,132,135,136,140, %T A067028 144,150,152,156,160,184,189,196,198,204,210,216,220,224,225,228,232, %U A067028 234,240,248,250,256,260,276,294,296,297,306,308,315,324,328,330,336 %N A067028 Numbers with a composite number of prime factors (counted with multiplicity). %H A067028 Harry J. Smith, <a href="/A067028/b067028.txt">Table of n, a(n) for n = 1..1000</a> %e A067028 a(1)=16, 16 has 4 prime factors (counted with multiplicity) and 4 is composite. %o A067028 (PARI) is(n)=my(t=bigomega(n)); t>1 && !isprime(t) \\ _Charles R Greathouse IV_, Oct 15 2015 %Y A067028 Cf. A063989. %K A067028 nonn %O A067028 1,1 %A A067028 _Shyam Sunder Gupta_, Feb 16 2002