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 A062793 #12 Nov 05 2018 03:08:28
%S A062793 1,3,26,252,3124,46626,823542,16776960,387420462,9999996872,
%T A062793 285311670610,8916100401348,302875106592252,11112006824734470,
%U A062793 437893890380856224,18446744073692774400,827240261886336764176
%N A062793 Moebius transform of n^n.
%C A062793 n=4, f[4]=4^4=256, divisors={1,2,4} f[4/d]={256,4,1}, mu[d]={1,-1,0}, the sum is 256-4=252=a(4)
%H A062793 Seiichi Manyama, <a href="/A062793/b062793.txt">Table of n, a(n) for n = 1..386</a>
%F A062793 a(n) = Sum{f[n/d]*mu[d]}, where d|n and f[x]=A000312(x).
%o A062793 (PARI) a(n) = sumdiv(n, d, d^d*moebius(n/d)); \\ _Michel Marcus_, Nov 04 2018
%Y A062793 Cf. A000312, A008683.
%K A062793 nonn
%O A062793 1,2
%A A062793 _Labos Elemer_, Jul 19 2001