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 A050496 #6 Mar 30 2012 18:34:53 %S A050496 6,12,6,18,24,12,36,48,18,54,66,24,72,30,96,102,36,108,114,138,42,132, %T A050496 138,48,144,54,162,174,60,186,192,66,198,204,72,216,222,228,276,246, %U A050496 84,258,264,90,276,282,96,288,102,306,318,108,324,342,348,354,120,414 %N A050496 Increments in arithmetic progressions of at least 4 terms having the same value of phi(x) in A050495. %e A050496 phi(72)=phi(78)=phi(84)=phi(90)=24, common difference is 6, so 6 is a member of the sequence. %Y A050496 Cf. A000010, A050495, A050497. %K A050496 nonn %O A050496 1,1 %A A050496 _Jud McCranie_, Dec 27 1999