k[1] = -247/100
k[2] = 1097/50
k[3] = 641/100
k[4] = 7/4
k[5] = 4/5
k[6] = 1/20
k[7] = 693/1000
k[8] = 1/500
k[9] = 7/100
k[10] = 1/5
k[11] = 91/10
k[12] = 1