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 A050993 #36 Feb 16 2025 08:32:41 %S A050993 25,65,85,145,165,185,205,265,305,365,445,485,505,545,565,685,745,785, %T A050993 825,865,905,965,985,1085,1145,1165,1205,1285,1345,1385,1405,1465, %U A050993 1565,1585,1685,1745,1765,1865,1925,1945,1985,2005,2045,2105,2165 %N A050993 5-Knödel numbers. %H A050993 Amiram Eldar, <a href="/A050993/b050993.txt">Table of n, a(n) for n = 1..10000</a> %H A050993 John H. Castillo and Jhony Fernando Caranguay Mainguez, <a href="https://arxiv.org/abs/1708.06812">The set of k-units modulo n</a>, arXiv:1708.06812 [math.NT], 2017. %H A050993 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KnoedelNumbers.html">Knödel Numbers</a> %t A050993 Select[Range[10, 2500, 5], Divisible[# - 5, CarmichaelLambda[#]]&] (* _Jean-François Alcover_, Mar 01 2018 *) %Y A050993 Cf. A002997, A050990, A033553, A050992, A208154-A208158. %K A050993 nonn %O A050993 1,1 %A A050993 _Eric W. Weisstein_