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 A124438 #6 Mar 25 2018 12:16:50 %S A124438 8,9,25,32,40,45,49,56,63,64,75,81,88,96,99,104,117,121,125,128,136, %T A124438 147,152,153,162,169,171,175,184,200,207,224,225,232,243,245,248,250, %U A124438 261,275,279,280,288,289,296,315,320,325,328,333,343,344,352 %N A124438 Numbers that are not divisible by at least one of the (positive) exponents in their prime factorization. %C A124438 Except for 1, every member of A124184 is in this sequence. Also, this sequence does not contain any squarefree numbers. %H A124438 Harvey P. Dale, <a href="/A124438/b124438.txt">Table of n, a(n) for n = 1..1000</a> %t A124438 Select[Range[400],MemberQ[Divisible[#,FactorInteger[#][[All,2]]],False]&] (* _Harvey P. Dale_, Mar 25 2018 *) %Y A124438 Cf. A124184. %K A124438 nonn %O A124438 1,1 %A A124438 Franklin T. Adams-Watters, Dec 16 2006