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 A218417 #19 May 13 2023 17:38:02 %S A218417 135,216,819,2678400,6780874383360,15298997575680,358160471832960, %T A218417 878948428037760,69640897897267200,27548836016065625124864000, %U A218417 114509071123027415138304000,204540330952262537736192000,32445066814696289084018688000,42000317261222229165905510400 %N A218417 Numbers k for which sigma(k)/k - 7/9 is an integer. %C A218417 a(5) > 10^11. - _Donovan Johnson_, Nov 01 2012 %C A218417 a(5) > 10^12. - _Giovanni Resta_, Nov 04 2012 %Y A218417 Cf. A218414, A218430, A160320, A218415, A218416, A160321, A218418. %K A218417 nonn %O A218417 1,1 %A A218417 _Zdenek Cervenka_, Oct 28 2012 %E A218417 More terms from _Michel Marcus_, Jun 26 2013