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 A270564 #9 May 03 2019 12:54:34 %S A270564 2,24,240,264,480,504,552,1128,1416,1992,2568,4008,4296,5448,5520, %T A270564 5736,6312,6960,8328,8616,9192,10632,11208,11280,11496,12072,12408, %U A270564 12720,13200,13512,13920,14088,14160,15528,15576,15816,16320,17256,18744,19848,19920,20136,20712,21288,21912,22560,23592 %N A270564 Terms of A143407, sorted. %C A270564 Numbers m such that r is the maximal order in the multiplicative group modulo m and there is no M > m with the same maximal order modulo M. %Y A270564 Cf. A143407, A002322, A002174, A270562. %K A270564 nonn %O A270564 1,1 %A A270564 _Joerg Arndt_, Mar 19 2016