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 A025622 #24 Jul 06 2025 14:50:18
%S A025622 1,5,6,25,30,36,125,150,180,216,625,750,900,1080,1296,3125,3750,4500,
%T A025622 5400,6480,7776,15625,18750,22500,27000,32400,38880,46656,78125,93750,
%U A025622 112500,135000,162000,194400,233280,279936,390625,468750,562500,675000
%N A025622 Numbers of form 5^i*6^j, with i, j >= 0.
%H A025622 Amiram Eldar, <a href="/A025622/b025622.txt">Table of n, a(n) for n = 1..10000</a>
%F A025622 Sum_{n>=1} 1/a(n) = (5*6)/((5-1)*(6-1)) = 3/2. - _Amiram Eldar_, Sep 25 2020
%F A025622 a(n) ~ exp(sqrt(2*log(5)*log(6)*n)) / sqrt(30). - _Vaclav Kotesovec_, Sep 25 2020
%F A025622 a(n) = 5^A025651(n) *6^A025659(n). - _R. J. Mathar_, Jul 06 2025
%t A025622 n = 10^6; Flatten[Table[5^i*6^j, {i, 0, Log[5, n]}, {j, 0, Log[6, n/5^i]}]] // Sort (* _Amiram Eldar_, Sep 25 2020 *)
%Y A025622 Cf. A000351 (subset), A000400 (another subset), A025651 (exponent of 5).
%K A025622 easy,nonn
%O A025622 1,2
%A A025622 _David W. Wilson_