527425domain: NAppears in sequencesa(n) = 4*n^4 + 17*n^2 + 4.at n=19A156701Heinz numbers of aperiodic integer partitions into relatively prime parts whose reciprocal sum is 1.at n=25A316888Heinz numbers of integer partitions into relatively prime parts whose reciprocal sum is 1.at n=25A316890