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 A124509 #14 Feb 16 2025 08:33:03
%S A124509 1,6,12,24,36,48,72,96,144,192,216,288,384,432,576,768,864,1152,1296,
%T A124509 1536,1728,2304,2592,3072,3456,4608,5184,6144,6912,7776,9216,10368,
%U A124509 12288,13824,15552,18432,20736,24576,27648,31104,36864,41472,46656,49152,55296,62208
%N A124509 Range of A124508.
%C A124509 1 together with numbers of the form 2^i * 3^j with i >= j >= 1. - _Amiram Eldar_, Jul 11 2023
%H A124509 Amiram Eldar, <a href="/A124509/b124509.txt">Table of n, a(n) for n = 1..10000</a>
%H A124509 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SmoothNumber.html">Smooth Number</a>.
%F A124509 a(n) = A124508(A124510(n)).
%F A124509 Sum_{n>=1} 1/a(n) = 7/5. - _Amiram Eldar_, Jul 11 2023
%t A124509 With[{max = 70000}, Join[{1}, Sort[Flatten[Table[2^i*3^j, {i, 1, Log2[max]}, {j, 1, Min[i, Log[3, max/2^i]]}]]]]] (* _Amiram Eldar_, Jul 11 2023 *)
%Y A124509 Subsequence of A003586.
%Y A124509 A007283 is a subsequence.
%Y A124509 Cf. A124508, A124510.
%K A124509 nonn,easy
%O A124509 1,2
%A A124509 _Reinhard Zumkeller_, Nov 04 2006
%E A124509 Missing term a(43) inserted and more terms added by _Amiram Eldar_, Jul 11 2023