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 A073068 #6 Mar 30 2012 18:39:05 %S A073068 0,1,1,0,1,0,1,2,1,0,1,0,1,0,1,2,3,4,3,2,1,0,1,0,1,0,0,1,2,2,1,0,1,0, %T A073068 1,2,1,0,1,0,1,2,3,2,1,0,1,2,3,4,5,4,3,2,1,0,1,0,1,0,1,0,1,2,3,4,5,4, %U A073068 3,2,1,0,1,0,0,1,2,2,1,0,1,0,1,0,1,0,1,0,1,2,3,2,1,0,1,2,3,4,5,4,3,2,1,0,1 %N A073068 Minimum value of abs(n-x*tau(x)) x>0. %F A073068 a(A036438(n))=0 . It seems that sum(k=1, n, a(k)) is asymptotic to C*n with 1.5<C<2 %o A073068 (PARI) a(n)=vecmin(vector(n,k,abs(n-k*numdiv(k)))) %K A073068 nonn %O A073068 1,8 %A A073068 _Benoit Cloitre_, Aug 17 2002