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 A083541 #9 Apr 09 2021 03:50:52
%S A083541 24,48,84,264,288,312,336,576,960,1152,1440,1440,1440,1440,1680,2100,
%T A083541 2160,2688,2640,3360,3024,3360,3360,4320,4320,5376,4032,4464,5040,
%U A083541 4788,6048,7392,6720,6840,7644,6300,7440,7560,7020,10080,10080,8064,10080
%N A083541 Values of y from solutions to sigma(x+1)*sigma(x)=y^2, where A083539(x) = y^2 is a square number.
%H A083541 Amiram Eldar, <a href="/A083541/b083541.txt">Table of n, a(n) for n = 1..10000</a>
%F A083541 a(n) = sqrt(sigma(A083540(n)) * sigma(1+A083540(n))).
%t A083541 Do[s=Sqrt[DivisorSigma[1, n+1]*DivisorSigma[1, n]]; If[IntegerQ[s], Print[s]], {n, 1, 5000}]
%Y A083541 Cf. A000203, A083539, A083540, A083538, A060780, A060781.
%K A083541 nonn
%O A083541 1,1
%A A083541 _Labos Elemer_, May 21 2003