# A219859 (b-file synthesized from sequence entry) 0 1 1 1 2 0 3 2 4 2 5 0 6 6 7 18 8 3 9 0 10 24 11 144 12 84 13 4 14 0 15 120 16 1200 17 1500 18 300 19 5 20 0 21 720 22 10800 23 23400 24 10800 25 930 26 6 27 0 28 5040 29 105840 30 352800 31 294000 32 63210 33 2646 34 7 35 0 36 40320 37 1128960 38 5362560 39 7056000 40 2857680 41 324576 42 7112 43 8 44 0 45 362880 46 13063680 47 83825280 48 160030080 49 105099120 50 23496480 51 1524600 52 18360 53 9 54 0