61038domain: NAppears in sequencesNumerators of increasingly better rational approximations to Pi with increasing denominators (3/1, 13/4, 16/5, 19/6, 22/7, 179/57, ...)at n=39A063674Numbers n such that the k-th binary digit of n equals mu(k)^2 for k=1 up to A029837(n+1).at n=15A074988