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 A336042 #5 Jul 08 2020 02:24:36 %S A336042 1,6,90,1031,1099 %N A336042 Numbers k such that A000055(k) is divisible by k. %C A336042 No other terms below 40000. %e A336042 90 is in the sequence because A000055(90) = 90*179212383627255715871103677440244414 %Y A336042 Cf. A000055, A051420, A119642, A336039. %K A336042 nonn,more %O A336042 1,2 %A A336042 _Vaclav Kotesovec_, Jul 08 2020