# A321907 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 0 5 6 6 0 7 24 8 0 9 0 10 0 11 120 12 0 13 720 14 0 15 0 16 0 17 5040 18 0 19 40320 20 0 21 0 22 0 23 362880 24 0 25 0 26 0 27 0 28 0 29 3628800 30 0 31 39916800 32 0 33 0 34 0 35 0 36 0 37 479001600 38 0 39 0 40 0 41 6227020800 42 0 43 87178291200 44 0 45 0 46 0 47 1307674368000 48 0 49 0 50 0 51 0 52 0 53 20922789888000 54 0 55 0 56 0 57 0 58 0