# A303638 (b-file synthesized from sequence entry) 1 1 2 2 3 0 4 6 5 0 6 3 7 24 8 0 9 12 10 8 11 120 12 0 13 540 14 40 15 0 16 720 17 0 18 6120 19 240 20 0 21 144 22 5040 23 0 24 83160 25 1680 26 0 27 1008 28 840 29 40320 30 0 31 1310400 32 13440 33 0 34 8064 35 6720 36 5760 37 362880 38 0 39 321012720 40 120960 41 0 42 72576 43 60480 44 51840 45 0 46 3628800 47 0 48 9394509600 49 207648000 50 0 51 725760 52 604800 53 518400 54 0 55 0