# A014257 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 6 5 6 6 24 7 16 8 60 9 10 10 0 11 0 12 0 13 144 14 576 15 2016 16 2700 17 0 18 384 19 5120 20 0 21 0 22 0 23 0 24 24696 25 21600 26 0 27 18816 28 691200 29 0 30 0 31 1032192 32 11757312 33 27993600 34 6096384 35 39191040 36 64012032 37 15240960 38 0 39 387072000 40 0 41 0 42 0 43 0 44 0 45 0 46 0 47 0 48 0 49 125971200 50 0 51 4180377600 52 0 53 0 54 0