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 A035033 #21 Jul 20 2024 12:27:37 %S A035033 1,2,3,4,6,8,9,10,12,14,15,16,18,20,24,28,30,32,36,40,42,48,54,56,60, %T A035033 72,80,84,90,96,108,120,126,132,140,144,168,180,192,210,216,240,252, %U A035033 288,300,336,360,420,480,504,540,720,840,1260 %N A035033 Numbers k such that k <= d(k)^2, where d() = number of divisors (A000005). %t A035033 Select[Range[1300],#<=DivisorSigma[0,#]^2&] (* _Harvey P. Dale_, Mar 16 2012 *) %o A035033 (PARI) is(n)=numdiv(n)^2>=n \\ _Charles R Greathouse IV_, Aug 03 2012 %Y A035033 Cf. A000005, A035034, A035035, A033950, A036763, A034884, A273323. %K A035033 nonn,fini,full %O A035033 1,2 %A A035033 _Erich Friedman_, _Labos Elemer_