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 A218416 #25 May 13 2023 17:32:07 %S A218416 117,3780,66960,167400,406224,1097280,6656832,13035330,29410290, %T A218416 4529295360,27477725184,88071903612,1159632322560,7035102756864, %U A218416 18554223329280,22385029489560,54934276752360,112562288197632,125356165141536,307631949813216,1317932346931200 %N A218416 Numbers k for which sigma(k)/k - 5/9 is an integer. %C A218416 a(13) > 10^11. - _Donovan Johnson_, Nov 01 2012 %C A218416 a(13) > 10^12. - _Giovanni Resta_, Nov 04 2012 %C A218416 Note that there are no terms here with abundancy 23/9 (k=2). - _Michel Marcus_, Jun 25 2013 %Y A218416 Cf. A218414, A218430, A160320, A218415, A160321, A218417, A218418. %K A218416 nonn %O A218416 1,1 %A A218416 _Zdenek Cervenka_, Oct 28 2012 %E A218416 a(10)-a(12) from _Donovan Johnson_, Nov 01 2012 %E A218416 More terms from _Michel Marcus_, Jun 25 2013