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 A346569 #19 Apr 22 2024 14:29:10 %S A346569 938531360353681,6178246534322281,518705522457928921, %T A346569 7019247908645553241,16242056799655920481,94812683932464811561, %U A346569 94986212971063089241,408133613144935002601,418441276466266605481,453648717063017803081,556606627235843071681,1140359076998537247001 %N A346569 Carmichael numbers (A002997) k such that A003961(k) is also a Carmichael number. %C A346569 Each of the first 17 terms has 3 distinct prime divisors. [updated Apr 22 2024] %C A346569 a(6) <= 94812683932464811561. A term with 4 prime factors is 9584146525723596902470058833132261. - _Daniel Suteu_, Jul 24 2021 %H A346569 Amiram Eldar, <a href="/A346569/b346569.txt">Table of n, a(n) for n = 1..17</a> (terms below 10^22 calculated using data from Claude Goutier) %H A346569 Claude Goutier, <a href="http://www-labs.iro.umontreal.ca/~goutier/OEIS/A055553/">Compressed text file carm10e22.gz containing all the Carmichael numbers up to 10^22</a>. %H A346569 <a href="/index/Ca#Carmichael">Index entries for sequences related to Carmichael numbers</a>. %e A346569 938531360353681 = 53881 * 107761 * 161641 is a term since it is a Carmichael number, and A003961(938531360353681) = 53887 * 107773 * 161659 = 938844932257009 is also a Carmichael number. %Y A346569 Cf. A002997, A003961. %Y A346569 Subsequence of A346568. %K A346569 nonn %O A346569 1,1 %A A346569 _Amiram Eldar_, Jul 23 2021 %E A346569 a(6) verified and a(7)-a(13) calculated using using data from _Claude Goutier_ by _Amiram Eldar_, Apr 22 2024