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 A108201 #11 Mar 30 2025 03:13:40
%S A108201 1,5,12,25,60,125,144,300,625,720,1500,1728,3125,3600,7500,8640,15625,
%T A108201 18000,20736,37500,43200,78125,90000,103680,187500,216000,248832,
%U A108201 390625,450000,518400,937500,1080000,1244160,1953125,2250000,2592000
%N A108201 Numbers of the form (5^i)*(12^j), with i, j >= 0.
%H A108201 Amiram Eldar, <a href="/A108201/b108201.txt">Table of n, a(n) for n = 1..10000</a>
%F A108201 Sum_{n>=1} 1/a(n) = 15/11. - _Amiram Eldar_, Mar 29 2025
%t A108201 Take[Union[5^First[#] 12^Last[#]&/@Tuples[Range[0,20],2]],50] (* _Harvey P. Dale_, Mar 23 2012 *)
%Y A108201 Cf. A025622, A003595, A025623, A025624, A025625, A003598, A107466, A064476.
%K A108201 nonn,easy
%O A108201 1,2
%A A108201 Douglas Winston (douglas.winston(AT)srupc.com), Jun 15 2005