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 A159993 #6 Feb 04 2025 23:38:15
%S A159993 1,30,3600,36000,4320000,24300000,23328000000,93312000000,
%T A159993 3359232000000,223948800000000,604661760000000000,
%U A159993 36279705600000000000,544195584000000000000,1360488960000000000000,326517350400000000000000
%N A159993 Denominator of Sum_{k=0..n} A159990(k)/A159991(k), numerator=A159992.
%H A159993 R. Zumkeller, <a href="/A159993/b159993.txt">Table of n, a(n) for n = 0..30</a>
%Y A159993 A159991, subsequence of A051037, the 5-smooth numbers.
%K A159993 frac,nonn
%O A159993 0,2
%A A159993 _Reinhard Zumkeller_, May 01 2009