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 A098902 #12 Apr 06 2018 15:32:28
%S A098902 6,10,12,14,18,20,22,24,26,28,34,36,38,40,44,46,48,50,52,54,56,58,62,
%T A098902 68,72,74,76,80,82,86,88,92,94,96,98,100,104,106,108,112,116,118,122,
%U A098902 124,134,136,142,144,146,148,152,158,160,162,164,166,172,176,178,184,188
%N A098902 Even numbers whose number of distinct prime factors is also even.
%H A098902 Vincenzo Librandi, <a href="/A098902/b098902.txt">Table of n, a(n) for n = 1..1000</a>
%e A098902 a(3)=12 because 12 is even and number of distinct prime factors of 12 is also even i.e. 2
%t A098902 Select[Range[800], And@@EvenQ[{#, PrimeNu[#]}]&] (* _Vincenzo Librandi_, Feb 21 2014 *)
%t A098902 Select[Range[0,200,2],EvenQ[PrimeNu[#]]&] (* _Harvey P. Dale_, Apr 06 2018 *)
%Y A098902 Cf. A001221.
%K A098902 nonn,easy
%O A098902 1,1
%A A098902 _Shyam Sunder Gupta_, Oct 14 2004