0 1 1 1 6 1.11111 2 63 1.24992 3 364 1.42753 4 1365 1.65984 5 3906 1.96875 6 9331 2.38336 7 19608 2.94117 8 37449 3.68928 9 66430 4.68559 10 111111 6 11 177156 7.71561 12 271453 9.92992 13 402234 12.75603 14 579195 16.32384 15 813616 20.78125 16 1118481 26.29536 17 1508598 33.05367 18 2000719 41.26528 19 2613660 51.16209 20 3368421 63