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 A046754 #20 Aug 07 2019 05:32:27 %S A046754 1,9,128,625,972,1152,2000,2025,5625,6561,7776,8100,10000,10800,18000, %T A046754 21952,26244,30000,32768,35721,50625,55296,56700,64000,64800,65856, %U A046754 70000,80000,84672,89100,90000,97200,98304,99225,105300,109760,110000 %N A046754 Numbers k such that the square of d(k) (number of divisors) divides k. %C A046754 Subset of A033950. %H A046754 Amiram Eldar, <a href="/A046754/b046754.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..1000 from Donovan Johnson) %e A046754 If k = 972, d(k) = sigma(0,k) = 18. Its square is 324 which divides 972. %t A046754 Select[Range[110000], IntegerQ[#/DivisorSigma[0, #]^2] &] (* _Jayanta Basu_, Jun 28 2013 *) %Y A046754 Cf. A033950, A046755, A046756. %K A046754 nonn %O A046754 1,2 %A A046754 _Labos Elemer_