# A138771 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 2 5 3 6 1 7 6 8 11 9 5 10 2 11 24 12 50 13 26 14 14 15 6 16 120 17 274 18 154 19 94 20 54 21 24 22 720 23 1764 24 1044 25 684 26 444 27 264 28 120 29 5040 30 13068 31 8028 32 5508 33 3828 34 2568 35 1560 36 720 37 40320 38 109584 39 69264 40 49104 41 35664 42 25584 43 17520 44 10800 45 5040