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 A362012 #13 Dec 02 2023 09:13:11
%S A362012 6,10,12,14,18,20,24,28,30,33,36,39,40,42,48,50,51,54,55,56,57,60,65,
%T A362012 66,69,70,72,77,78,80,84,85,87,90,91,93,95,96,98,99,100,102,108,110,
%U A362012 111,112,114,115,117,119,120,123,126,129,130,132,133,138,140,141,144,145,150,153,154,155,156,159,160
%N A362012 Numbers k such that 1 < gcd(k, 105) < k and A007947(k) does not divide 105.
%C A362012 The asymptotic density of this sequence is 19/35. - _Amiram Eldar_, Dec 02 2023
%H A362012 Michael De Vlieger, <a href="/A362012/b362012.txt">Table of n, a(n) for n = 1..10000</a>
%H A362012 Michael De Vlieger, <a href="/A362012/a362012.png">Diagram showing numbers k in this sequence</a> instead as k mod 105, in black, else white if k is coprime to 105, purple if k = 1, red if k | 105, and gold if rad(k) | 105, magnification 10X.
%F A362012 This sequence is { N \ { A108347 U A236206 } }.
%t A362012 With[{n = 105}, Select[Range[200], And[! CoprimeQ[#, n], ! Divisible[n, Times @@ FactorInteger[#][[All, 1]]]] & ] ]
%Y A362012 Cf. A007947, A108347, A236206.
%K A362012 nonn
%O A362012 1,1
%A A362012 _Michael De Vlieger_, Apr 04 2023