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 A080304 #8 Aug 06 2018 22:26:46 %S A080304 1,1,1,1,1,6,1,1,1,10,1,1,1,14,15,1,1,1,1,1,21,22,1,1,1,26,1,1,1,1,1, %T A080304 1,33,34,35,1,1,38,39,1,1,1,1,1,1,46,1,1,1,1,51,1,1,1,55,1,57,58,1,1, %U A080304 1,62,1,1,65,1,1,1,69,1,1,1,1,74,1,1,77,1,1,1,1,82,1,1,85,86,87,1,1,1,91,1 %N A080304 Numerator of n^mu(n), where mu is the Moebius function (A008683). %H A080304 Antti Karttunen, <a href="/A080304/b080304.txt">Table of n, a(n) for n = 1..65537</a> %F A080304 a(n) = if mu(n)>0 then n else 1. %o A080304 (PARI) A080304(n) = numerator(n^moebius(n)); \\ _Antti Karttunen_, Aug 06 2018 %Y A080304 Denominator: A080305. Cf. A080306, A080326, A166142. %K A080304 nonn,frac %O A080304 1,6 %A A080304 _Reinhard Zumkeller_, Feb 13 2003