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 A268332 #13 Mar 20 2016 13:04:28 %S A268332 2526,44405,47527,47973,55779,72474,101037,106327,106674,109023, %T A268332 110107,133577,153173,165574,183553,186247,193026,196747,208847, %U A268332 209674,212127,218527,220209,234622,237522,245149,261478,266853,269953,308649,328877,334522,342066,364151,370785,375823 %N A268332 Squarefree numbers differing by more than 3 from any other squarefree number. %H A268332 Christopher E. Thompson, <a href="/A268332/b268332.txt">Table of n, a(n) for n = 1..1000</a> %p A268332 SF:= select(numtheory:-issqrfree, [$1..10^6]): %p A268332 SF[select(i -> SF[i]-SF[i-1]>=4 and SF[i+1]-SF[i]>=4, [$2..nops(SF)-1])]; # _Robert Israel_, Feb 02 2016 %Y A268332 Cf. A005117, A073247, A268331, A268333, A268334. %K A268332 nonn %O A268332 1,1 %A A268332 _Christopher E. Thompson_, Feb 01 2016