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 A025628 #12 Jul 06 2025 10:18:20
%S A025628 1,6,9,36,54,81,216,324,486,729,1296,1944,2916,4374,6561,7776,11664,
%T A025628 17496,26244,39366,46656,59049,69984,104976,157464,236196,279936,
%U A025628 354294,419904,531441,629856,944784,1417176,1679616,2125764,2519424,3188646
%N A025628 Numbers of form 6^i*9^j, with i, j >= 0.
%H A025628 Amiram Eldar, <a href="/A025628/b025628.txt">Table of n, a(n) for n = 1..10000</a>
%F A025628 Sum_{n>=1} 1/a(n) = (6*9)/((6-1)*(9-1)) = 27/20. - _Amiram Eldar_, Sep 26 2020
%F A025628 a(n) ~ exp(sqrt(2*log(6)*log(9)*n)) / sqrt(54). - _Vaclav Kotesovec_, Sep 26 2020
%F A025628 a(n) = 6^A025662(n) *9^A025680(n). - _R. J. Mathar_, Jul 06 2025
%t A025628 n = 10^6; Flatten[Table[6^i*9^j, {i, 0, Log[6, n]}, {j, 0, Log[9, n/6^i]}]] // Sort (* _Amiram Eldar_, Sep 26 2020 *)
%Y A025628 Subsequence of A025614.
%K A025628 easy,nonn
%O A025628 1,2
%A A025628 _David W. Wilson_