k[1] = 0
k[2] = 0
k[3] = 1
k[4] = 1/5
k[5] = 10
k[6] = 1/20
k[7] = 19/50000
k[8] = 19/50000
k[9] = 1/62500
k[10] = 3/12500
k[11] = 19/50000
k[12] = 10
k[13] = 1/20
k[14] = 5/2