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 A050497 #14 Apr 28 2022 19:43:12 %S A050497 24,48,72,72,96,144,144,192,216,216,240,288,288,288,384,384,432,432, %T A050497 432,480,432,480,528,576,576,648,648,672,576,720,768,720,720,768,864, %U A050497 864,864,864,960,960,864,1008,960,864,1056,1104,1152,1152,1152,1152,1248 %N A050497 Values of phi(x) in arithmetic progressions of at least 4 terms having the same value of phi(x) in A050495. %H A050497 Sean A. Irvine, <a href="/A050497/b050497.txt">Table of n, a(n) for n = 1..1000</a> %e A050497 phi(72)=phi(78)=phi(84)=phi(90)=24, so 24 is a member of the sequence. %Y A050497 Cf. A000010, A050495, A050496. %K A050497 nonn %O A050497 1,1 %A A050497 _Jud McCranie_, Dec 27 1999 %E A050497 Missing repeated terms inserted by _Sean A. Irvine_, Aug 15 2021