# A254883 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 0 4 1 5 1 6 0 7 2 8 2 9 1 10 0 11 6 12 9 13 3 14 1 15 0 16 24 17 48 18 24 19 4 20 1 21 0 22 120 23 300 24 200 25 50 26 5 27 1 28 0 29 720 30 2160 31 1800 32 600 33 90 34 6 35 1 36 0 37 5040 38 17640 39 17640 40 7350 41 1470 42 147 43 7 44 1 45 0 46 40320 47 161280 48 188160 49 94080 50 23520 51 3136 52 224 53 8 54 1