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 A049227 #12 Aug 15 2019 07:27:01 %S A049227 36,144,196,400,900,1764,3136,2304,3844,4900,12100,7056,13689,9216, %T A049227 6400,15876,25600,44100,93636,57600,32400,69696,81796,94864,57600, %U A049227 213444,72900,152100,152100,360000,230400,260100,298116,435600,298116,254016,291600,656100 %N A049227 Sigma(n) / d(n) is a perfect square associated with A049226. %H A049227 Amiram Eldar, <a href="/A049227/b049227.txt">Table of n, a(n) for n = 1..300</a> %F A049227 a(n) = A000203(A049226(n)) / A000005(A049226(n)). - _Amiram Eldar_, Aug 15 2019 %e A049227 a(27) = 72900 = 270^2 is a term since sigma(A049226(27))/d(A049226(27)) = 72900. %Y A049227 Cf. A000005, A000203, A049226, A049228. %K A049227 easy,nonn %O A049227 1,1 %A A049227 _Enoch Haga_ %E A049227 Offset corrected and more terms added by _Amiram Eldar_, Aug 15 2019