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 A268333 #7 Feb 02 2016 03:40:40 %S A268333 5876126,8061827,19375679,27926071,29002021,29850943,39224453, %T A268333 39728861,54427974,56389147,60529549,63520174,67806346,71987374, %U A268333 75239979,82490423,87011827,91332377,97447622,99368949,100842249,107447838,110196277,118389143,134817726,149840974,159140777,161651279 %N A268333 Squarefree numbers differing by more than 4 from any other squarefree number. %H A268333 Christopher E. Thompson, <a href="/A268333/b268333.txt">Table of n, a(n) for n = 1..200</a> %Y A268333 Cf. A073247, A268331, A268332, A268334. %K A268333 nonn %O A268333 1,1 %A A268333 _Christopher E. Thompson_, Feb 01 2016