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 A238103 #9 Sep 14 2018 13:34:14
%S A238103 1,1,1,6,72,720,1080,25200,40320,725760,25401600,558835200,
%T A238103 23950080000,1120863744000,1961511552000,58845346560000,
%U A238103 3452260331520000,4108189794508800000,7394741630115840000,521857480753889280000,948831783188889600000,39850934893933363200000,3287702128749502464000000
%N A238103 Product of composite numbers in range n+1 to 2n, exclusive of endpoints.
%H A238103 Harvey P. Dale, <a href="/A238103/b238103.txt">Table of n, a(n) for n = 1..423</a>
%e A238103 For n=6, the range (7,12) contains three composite numbers 8,9,10 whose product is a(6) = 720.
%t A238103 Table[Times@@Select[Range[n+2,2n-1],CompositeQ],{n,30}] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Sep 14 2018 *)
%Y A238103 Cf. A157625 (inclusive version).
%K A238103 nonn
%O A238103 1,4
%A A238103 _N. J. A. Sloane_, Feb 26 2014