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 A199407 #15 Mar 31 2012 10:30:50
%S A199407 3,5,9,11,15,21,23,29,33,35,39,45,51,114,183,243,4895,5247,9588,12188,
%T A199407 48503,48504,89175,179328,290783,4604093,4775623,7778968,13711516,
%U A199407 56075700,104257956,165309438,1913253201,9905967078,17096261103,121153257533
%N A199407 Integers n such that for all i > n the largest prime factor of product(i+k, {k,0,7}) exceeds the largest prime factor of product(n+k, {k,0,7}).
%C A199407 Heuristics show that these terms are valid, but a strict proof is yet to be done.
%H A199407 Andrey V. Kulsha, <a href="/A199407/b199407.txt">Table of n, a(n) for n = 1..39</a>
%Y A199407 Cf. A193948, A200566.
%K A199407 nonn
%O A199407 1,1
%A A199407 _Andrey V. Kulsha_, Nov 05 2011