# A223257 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 2 5 1 6 1 7 6 8 6 9 1 10 1 11 12 12 24 13 12 14 1 15 1 16 60 17 120 18 120 19 60 20 1 21 1 22 20 23 180 24 720 25 180 26 20 27 1 28 1 29 140 30 126 31 1680 32 1680 33 126 34 140 35 1 36 1 37 280 38 10080 39 10080 40 40320 41 10080 42 10080 43 280 44 1 45 1 46 2520 47 10080 48 1296 49 3456 50 3456 51 1296 52 10080 53 2520 54 1