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 A218410 #22 May 15 2023 12:14:34 %S A218410 840,55860,1089270,3666432,5322240,8714160,10281600,20109600,21785400, %T A218410 32104800,9904204800,10334134272,4660073935104,7322605472000, %U A218410 11887123248000,15387946358400,78599399424000,516876560449536,750304684523520,812193794048000 %N A218410 Numbers k for which sigma(k)/k - 3/7 is an integer. %C A218410 a(13) > 10^11. - _Donovan Johnson_, Oct 31 2012 %C A218410 a(13) > 10^12. - _Giovanni Resta_, Nov 04 2012 %C A218410 Note that there are no terms with abundancy 10/7 or 17/7. - _Michel Marcus_, Jun 25 2013 %Y A218410 Cf. A218428, A218409, A218411, A218412, A218413. %K A218410 nonn %O A218410 1,1 %A A218410 _Zdenek Cervenka_, Oct 28 2012 %E A218410 a(5)-a(12) from _Donovan Johnson_, Oct 31 2012 %E A218410 More terms from _Michel Marcus_, Jun 25 2013