-5468849774domain: ZAppears in sequencesNumerator of Sum_{k=1..n} mu(k)/k when it changes sign.at n=12A070890a(n) = numerator of rational number Im(P(x))/Pi, for x in interval (1/A005117(n+1),1/A005117(n)), where P(x) is the prime zeta function.at n=23A385808