k[1] = 202927753036139/250000000000000000 k[2] = 566528253772301/100000000000000000 k[3] = 245914295524883/500000000000000000 k[4] = 114186392006403/10000000000000000 k[5] = 446994772958953/1000000000000000000 k[6] = 343995957326369/100000000000000000 k[7] = 949914492651531/10000000000000000 k[8] = 3304212710223/6250000000000000 k[9] = 152252549827479/100000000000000000 k[10] = 898496674617627/100000000000000 k[11] = 3084375753243/200000000000 k[12] = 606420498690851221153086771456000000000000000000000000/123707881288699188718310260341637672344034641294404521 k[13] = 1 k[14] = 90 k[15] = 127 k[16] = 224 k[17] = 1909 k[18] = 1909 k[19] = 3316 k[20] = 3316