# A107729 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 2 4 0 5 2 6 0 7 8 8 0 9 6 10 16 11 0 12 40 13 0 14 24 15 0 16 136 17 0 18 240 19 0 20 120 21 272 22 0 23 1232 24 0 25 1680 26 0 27 720 28 0 29 3968 30 0 31 12096 32 0 33 13440 34 0 35 5040 36 7936 37 0 38 56320 39 0 40 129024 41 0 42 120960 43 0 44 40320 45 0 46 176896 47 0 48 814080 49 0 50 1491840 51 0 52 1209600 53 0 54 362880 55 353792 56 0