n | { x , y } ================================== 1 | { 0 , (1/6) }, 2 | { -(11/97) , (665/4656) }, 3 | { -(4745440/30630997) , (2155674289/206391657786) } . . . More terms as numerators and denominators at: https://ptpb.pw/-lf7 Plotting these few points starts to show a nice dihedral symmetry. Cheers, Brad