k[1] = 4
k[2] = 1
k[3] = 1
k[4] = 1
k[5] = 1
k[6] = 3/10
k[7] = 1
k[8] = 3/10
k[9] = 1/10
k[10] = 3/40
k[11] = 1
k[12] = 3/10
k[13] = 3/10
k[14] = 1
k[15] = 0