56245domain: NAppears in sequencesNumbers n such that absolute value of Sum_{k=1..n} mu(k)/k sets a new minimum.at n=21A070892Sum of terms in n-th row of A077164.at n=38A077167Constant term of the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=18A192975