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 A291804 #14 Sep 07 2017 21:15:02 %S A291804 720,1092,1224,1350,912,2016,2352,3600,3968,4680,7068,9936,11340, %T A291804 13848,18872,28728,43008,59520,101520,124380,175824,189900,311040, %U A291804 433008,618120,747936,1330560,2219520,3930240,7607808,15305472 %N A291804 a(n) = sigma(A291789(n)). %C A291804 Created in the hope that it will help explain the long-term behavior of A291789, which is the mean of this and A291805. %H A291804 Sean A. Irvine, <a href="/A291804/b291804.txt">Table of n, a(n) for n = 1..504</a> %Y A291804 Cf. A291789, A291805. %K A291804 nonn %O A291804 1,1 %A A291804 _N. J. A. Sloane_, Sep 07 2017