k[1] = 63/40
k[2] = 2
k[3] = 9/125
k[4] = 3/10000
k[5] = 1/10000
k[6] = 1/100
k[7] = 7/10
k[8] = 7/10
k[9] = 1
k[10] = 20
k[11] = 1/1250
k[12] = 1/625
k[13] = 1/100
k[14] = 18/25
k[15] = 1/1250
k[16] = 1/1250
k[17] = 1
k[18] = 1