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 A055196 #11 Aug 14 2021 07:55:45 %S A055196 6,28,40,117,135,496,775,891,1701,2176,5632,6875,8128,18688,23552, %T A055196 26624,44375,88723,89667,91136,274625,352256,557375,628849,722701, %U A055196 796797,1071875,1200663,1288625,1358127,1512875,2246503,2473984,2490368,2896363,2909375 %N A055196 Primitive numbers k that divide sigma(k)*phi(k). %C A055196 Terms from A011775 that are not a multiple of a previous term. - _Michel Marcus_, Dec 21 2013 %H A055196 Michel Marcus, <a href="/A055196/b055196.txt">Table of n, a(n) for n = 1..68</a> %Y A055196 Cf. A011775. %K A055196 easy,nonn %O A055196 1,1 %A A055196 _Robert G. Wilson v_, Jun 30 2000 %E A055196 Extended using A011775 b-file by _Michel Marcus_, Dec 21 2013