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 A290486 #14 Mar 27 2023 03:38:40 %S A290486 561,1105,1729,561,1105,561,1729,6601,2465,2821,29341,6601,334153, %T A290486 104569501,2508013,178837201,29341,8911,10024561,10585,2508013, %U A290486 985052881,19384289,46657,252601,52633,84350561,294409,3581761,1152271,139952671,410041,79624621 %N A290486 The least 3-Carmichael number that is divisible by the n-th odd prime, or 0 if no such number exists. %C A290486 The terms were calculated using Pinch's tables of Carmichael numbers (see link below). %H A290486 Amiram Eldar, <a href="/A290486/b290486.txt">Table of n, a(n) for n = 1..198</a> %H A290486 R. G. E. Pinch, <a href="http://s369624816.websitehome.co.uk/rgep/carpsp.html">Tables relating to Carmichael numbers</a>. %Y A290486 Cf. A065091 (Odd primes), A087788 (3-Carmichael numbers), A135721, A141705. %K A290486 nonn %O A290486 1,1 %A A290486 _Amiram Eldar_, Aug 03 2017 %E A290486 Escape clause added by _Jianing Song_, Dec 12 2021