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 A291805 #14 Sep 07 2017 21:26:04 %S A291805 72,120,200,352,792,280,480,464,1008,1240,1152,1088,2496,2304,2688, %T A291805 3360,4560,7920,8960,22080,19520,47040,28640,61440,82400,137760, %U A291805 126336,207360,319488,552960,1013760,2716416,4505024,7193472 %N A291805 a(n) = phi(A291789(n)). %C A291805 Created in the hope that it will help explain the long-term behavior of A291789, which is the mean of this and A291804. %H A291805 Sean A. Irvine, <a href="/A291805/b291805.txt">Table of n, a(n) for n = 1..504</a> %Y A291805 Cf. A291789, A291804. %K A291805 nonn %O A291805 1,1 %A A291805 _N. J. A. Sloane_, Sep 07 2017