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 A193947 #19 Mar 31 2012 10:30:50 %S A193947 1,5,7,11,13,17,23,25,31,35,285,340,528,1271,3476,4897,7564,11659, %T A193947 16683,18421,28032,44250,52323,61100,99381,3294850,5529832,13423043, %U A193947 149035259,255792095,528338092,2020271859,18069513341,74079238792 %N A193947 Integers n such that for all i > n the largest prime factor of i(i+1)(i+2)(i+3)(i+4)(i+5) exceeds the largest prime factor of n(n+1)(n+2)(n+3)(n+4)(n+5). %C A193947 Heuristics show that these terms are valid, but a strict proof is yet to be done. %H A193947 Andrey V. Kulsha, <a href="/A193947/b193947.txt">Table of n, a(n) for n = 1..36</a> %Y A193947 Cf. A193946, A193948. %K A193947 nonn %O A193947 1,2 %A A193947 _Andrey V. Kulsha_, Aug 10 2011