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 A218414 #17 May 13 2023 17:31:35 %S A218414 540,3276,58032,950976,1862190,17660160,3925389312,1005014679552, %T A218414 16080326885376,17908023591648,43947421401888,92069057203200, %U A218414 207726054681600,411471933675264,12363050673792000,160893693946908502272,269783631952374398976,467406267507560908800 %N A218414 Numbers k for which sigma(k)/k - 1/9 is an integer. %C A218414 a(8) > 10^11. - _Donovan Johnson_, Nov 01 2012 %C A218414 a(8) > 10^12. - _Giovanni Resta_, Nov 04 2012 %C A218414 Note that there are no terms with abundancy 10/9 (k=1) or 19/9 (k=2). _Michel Marcus_, Jun 25 2013 %Y A218414 Cf. A218430, A160320, A218415, A218416, A160321, A218417, A218418. %K A218414 nonn %O A218414 1,1 %A A218414 _Zdenek Cervenka_, Oct 28 2012 %E A218414 a(6)-a(7) from _Donovan Johnson_, Nov 01 2012 %E A218414 More terms from _Michel Marcus_, Jun 25 2013