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 A277573 #13 Jan 16 2022 09:15:52
%S A277573 1,3,5,6,7,9,11,13,15,17,18,19,21,23,25,27,29,30,31,33,35,36,37,39,41,
%T A277573 42,43,45,47,49,51,53,54,55,57,59,61,63,65,66,67,69,71,73,75,77,78,79,
%U A277573 81,83,85,87,89,90,91,93,95,97,99,101,102,103,105,107,108
%N A277573 a(n) = (1/3)*A277569(n).
%C A277573 From _Amiram Eldar_, Jan 16 2022: (Start)
%C A277573 Numbers whose 3-adic valuation is not smaller than their 2-adic valuation.
%C A277573 The asymptotic density of this sequence is 3/5. (End)
%H A277573 Clark Kimberling, <a href="/A277573/b277573.txt">Table of n, a(n) for n = 1..10000</a>
%t A277573 z = 260; a[b_] := Table[Mod[n/b^IntegerExponent[n, b], b], {n, 1, z}]
%t A277573 p[b_, d_] := Flatten[Position[a[b], d]]
%t A277573 p[6, 3]/3
%t A277573 (* second program *)
%t A277573 Select[Range[200], IntegerExponent[#, 3] >= IntegerExponent[#, 2] &] (* _Amiram Eldar_, Jan 16 2022 *)
%Y A277573 Cf. A007814, A007949.
%Y A277573 Cf. A277568, A277569, A277572, A277574.
%K A277573 nonn,easy
%O A277573 1,2
%A A277573 _Clark Kimberling_, Nov 01 2016