# A082037 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 2 5 2 6 1 7 3 8 6 9 6 10 1 11 4 12 10 13 24 14 24 15 1 16 5 17 14 18 42 19 120 20 120 21 1 22 6 23 18 24 60 25 216 26 720 27 720 28 1 29 7 30 22 31 78 32 312 33 1320 34 5040 35 5040 36 1 37 8 38 26 39 96 40 408 41 1920 42 9360 43 40320 44 40320 45 1 46 9 47 30 48 114 49 504 50 2520 51 13680 52 75600 53 362880 54 362880