# A223169 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 4 4 3 5 4 6 24 7 9 8 28 9 42 10 9 11 28 12 252 13 189 14 27 15 280 16 630 17 270 18 27 19 280 20 3360 21 3780 22 1080 23 81 24 3640 25 10920 26 7020 27 1404 28 81 29 3640 30 54600 31 81900 32 35100 33 5265 34 243 35 58240 36 218400 37 187200 38 56160 39 6480 40 243 41 58240 42 1048320 43 1965600