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 A287011 #12 Sep 03 2017 21:52:40 %S A287011 220,284,280540,365084,319550,430402,4532710,6135962,938304290, %T A287011 1344480478,14840132450,21445545118,35049418250,54192685558, %U A287011 20568863440125,32021343142659,92371445691525,154378742017851 %N A287011 Amicable numbers (m, n) with record low values of m/n. %C A287011 The 2 members in each pair are adjacent to each other in the sequence. %C A287011 The pairs were found using Sergei Chernykh's Amicable pair list. There are no other pairs with lesser member < 10^18. %H A287011 Sergei Chernykh, <a href="http://sech.me/ap/index.html">Amicable pairs list</a>. %H A287011 Shyam Sunder Gupta, <a href="http://www.shyamsundergupta.com/amicable.htm">Amicable Numbers</a>. %e A287011 The ratios m/n are %e A287011 220/284 = 0.774... %e A287011 280540/365084 = 0.768... %e A287011 319550/430402 = 0.742... %e A287011 4532710/6135962 = 0.738... %e A287011 938304290/1344480478 = 0.697... %e A287011 14840132450/21445545118 = 0.691... %e A287011 35049418250/54192685558 = 0.646... %e A287011 20568863440125/32021343142659 = 0.642... %e A287011 92371445691525/154378742017851 = 0.598... %Y A287011 Cf. A063990, A287026. %K A287011 nonn %O A287011 1,1 %A A287011 _Amiram Eldar_, Aug 31 2017