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 A110443 #11 Jun 04 2025 07:23:42 %S A110443 2,5,9,14,19,27,40,56,82,119,180,275,426,673,1072,1728,2807,4596,7558, %T A110443 12497,20741,34544,57704,96638,162204,272802,459637,775678,1310959, %U A110443 2218651,3759507,6377858 %N A110443 Index k of the least colossally abundant number c=A004490(k) with sigma(c)/c >= n. %C A110443 For the numbers, instead of the indices, see A110442. The last term, a(33), yields a 48361012-digit number having 6375908 prime factors. %e A110443 a(4)=9 because the 9th colossally abundant number is c=55440 and sigma(c)/c = 4.18701 > 4, while the 8th colossally abundant number is c'=5040 and sigma(c')/c' = 3.838 < 4. %Y A110443 Cf. A004490, A110442. %K A110443 nonn,more %O A110443 2,1 %A A110443 _T. D. Noe_, Jul 20 2005 %E A110443 Definition and example clarified by _Jonathan Sondow_, Dec 08 2011