k1 = 16/5
k2 = 1/2
k3 = 3/10
k4 = 1000
k5 = 1200/247
k6 = 53615828388897/1250000000000
k7 = 9/10
k8 = 253232284114507/100000000000000
k9 = 5317877966404647/10000000000000000
k10 = 25379134149469/62500000000
k11 = 69225021197403/250000000000
k12 = 45937500000000000/51064984612057559
k13 = 152274804896814/576875176645025
k14 = 286323500516327592324816080243/442590269802782060784707094080
k15 = 1
k16 = 2
k17 = 245
k18 = 210