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 A171241 #25 Jan 16 2022 08:19:05
%S A171241 8,12,18,27,40,56,60,84,88,90,104,126,132,135,136,152,156,184,189,198,
%T A171241 200,204,228,232,234,248,276,280,296,297,300,306,328,342,344,348,351,
%U A171241 372,376,392,414,420,424,440,444,450,459,472,488,492,513,516,520,522
%N A171241 Numbers k such that A169611(k) = 3.
%C A171241 Numbers of the form k*m where k is in {8, 12, 18, 27} and gcd(m, 6) = 1. - _David A. Corneth_, Aug 31 2019
%C A171241 The asymptotic density of this sequence is 65/648. - _Amiram Eldar_, Jan 16 2022
%H A171241 Amiram Eldar, <a href="/A171241/b171241.txt">Table of n, a(n) for n = 1..10000</a>
%t A171241 aQ[n_] := Plus @@ Last /@ Select[FactorInteger@n, 1 < #[[1]] < 4 &] == 3; Select[Range[522], aQ] (* _Amiram Eldar_, Aug 31 2019 after _Robert G. Wilson v_ at A169611 *)
%o A171241 (PARI) is(n) = bigomega(gcd(n, 1296)) == 3 \\ _David A. Corneth_, Aug 31 2019
%Y A171241 Cf. A007310, A169611, A171126.
%K A171241 nonn,easy
%O A171241 1,1
%A A171241 _Juri-Stepan Gerasimov_, Dec 05 2009
%E A171241 Corrected (200, 232, 280 inserted) and extended by _R. J. Mathar_, Jun 04 2010
%E A171241 Name corrected by _Amiram Eldar_, Aug 31 2019