572292domain: NAppears in sequencesLargest x such that 1/x + 1/y + 1/z = 1/n.at n=26A082986a(n) = n*(n+1)*(n*(n+1)+1).at n=28A169938a(n) = n^4 + 6n^3 + 14n^2 + 15n + 6.at n=26A176780