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 A374044 #15 Jun 28 2024 04:53:12
%S A374044 1,5,7,8,11,13,17,19,23,25,29,31,35,37,40,41,43,47,49,53,55,56,59,61,
%T A374044 64,65,67,71,73,77,79,83,85,88,89,91,95,97,101,103,104,107,109,113,
%U A374044 115,119,121,125,127,131,133,136,137,139,143,145,149,151,152,155,157,161,163,167,169,173,175,179,181,184,185,187
%N A374044 Non-multiples of 3 whose 2-adic valuation is a multiple of 3.
%C A374044 A multiplicative semigroup: if m and n are in the sequence, then so is m*n.
%C A374044 The asymptotic density of this sequence is 8/21. - _Amiram Eldar_, Jun 28 2024
%H A374044 Antti Karttunen, <a href="/A374044/b374044.txt">Table of n, a(n) for n = 1..12000</a>
%F A374044 {k | A007814(k) == 0 (mod 3), A007949(k) = 0}.
%t A374044 Select[Range[200], !Divisible[#, 3] && Divisible[IntegerExponent[#, 2], 3] &] (* _Amiram Eldar_, Jun 28 2024 *)
%o A374044 (PARI) isA374044 = A374043;
%Y A374044 Cf. A007814, A007949, A374043 (characteristic function).
%Y A374044 Intersection of A001651 and A191257.
%Y A374044 Subsequence of A339746, of A373992, and of A374042.
%K A374044 nonn,easy
%O A374044 1,2
%A A374044 _Antti Karttunen_, Jun 27 2024