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 A371953 #8 Apr 16 2024 14:03:47 %S A371953 13516958630,13662237610,14483820470,16161187910,16266406870, %T A371953 17187072770,17779204310,18055129190,19265719130,20027984690, %U A371953 20291032090,20945054548,21036318170,21395831170,21983936030,22134086030,22335605390,23837897510,24709171970,25630894310,26286582910 %N A371953 Weird numbers whose abundance is a weird number with weird abundance (A371952). %C A371953 Terms k of A006037 such that A033880(k) and A033880(A033880(k)) are also terms of A006037. %C A371953 Are there numbers k such that k, A033880(k), A033880(A033880(k)), and A033880(A033880(A033880(k))) are all terms of A006037? There are none below 10^11. %H A371953 Amiram Eldar, <a href="/A371953/b371953.txt">Table of n, a(n) for n = 1..146</a> (terms below 10^11) %H A371953 Wikipedia, <a href="https://en.wikipedia.org/wiki/Weird_number">Weird number</a>. %e A371953 13516958630 is a term because it is a weird number, A033880(13516958630) = sigma(13516958630) - 2*13516958630 = 833308916 is a weird number, and A033880(833308916) = sigma(833308916) - 2*833308916 = 7975928 is also a weird number. %Y A371953 Subsequence of A006037, A371920 and A371952. %Y A371953 Cf. A000203 (sigma), A033880 (abundance). %K A371953 nonn %O A371953 1,1 %A A371953 _Amiram Eldar_, Apr 14 2024