# A233543 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 1 5 2 6 1 7 1 8 2 9 6 10 1 11 1 12 2 13 6 14 24 15 1 16 1 17 2 18 6 19 24 20 120 21 1 22 1 23 2 24 6 25 24 26 120 27 720 28 1 29 1 30 2 31 6 32 24 33 120 34 720 35 5040 36 1 37 1 38 2 39 6 40 24 41 120 42 720 43 5040 44 40320 45 1 46 1 47 2 48 6 49 24 50 120 51 720 52 5040 53 40320 54 362880